Answer:
C
Step-by-step explanation:
3/5 + 2/5 + 4/5 = 1 4/5 or 9/5
Answers are c !!!
Step-by-step explanation:
if you added them you would get c I think hope this helps!!
Graph the image of the pre-image shown below, translated 4 units to the right, and 8 units down.
PLEAS ANSWER QUICK ASAP
The image of the transformation on the graph are (7, -7), (7, -2) and (-1, -14)
How to plot the graph of the function?The graph represents the given parameter
On the graph, we have the coordinates of the triangle to be
(3, 1), (3, 6) and (-5, -6)
The transformation rule is given as
Translated 4 units to the right, and 8 units down.
Mathematically, the transformation rule is given as
(x, y) = (x + 4, y - 8)
When the above transformation rule is applied to the coordinates of the triangle, we have
(3 + 4, 1 - 8), (3 + 4, 6 - 8) and (-5 + 4, -6 - 8)
Evaluate the sum and the difference
So, we have
(7, -7), (7, -2) and (-1, -14)
Next, we plot the image of the transformation on the graph
See attachment for the image of the transformation of the triangle on the graph
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which of the following is equivalent to x^2 -5x +6
Hello!
x² - 5x + 6
= (x² - 2x) + (-3x + 6)
= x(x - 2) - 3(x - 2)
= (x - 2)(x - 3)
Evaluate -3x^3 - 4x for x=-1.
Answer:
-x.(3x^2+4)
Step-by-step explanation:
Brain-list?
Answer:
-3(-1)^3-4(-1)= 27+4=31
Step-by-step explanation:-3 and -1 when you multiply both minus will change into plus. same for -4 and -1 when you multiply will change the signs. so you will get 27+4=31
Which of the following is a polynomial with roots: − square root of 3 , square root of 3, and −2? (6 points) Question 7 options: 1) x3 − 2x2 − 3x + 6 2) x3 − 3x2 − 5x + 15 3) x3 + 2x2 − 3x − 6 4) x3 + 3x2 − 5x − 15
Answer:
The polynomial is \(x^{3} - 1.46x^{2} - 3.93x + 6\)
Step-by-step explanation:
A nth order polynomial f(x) has roots \(x_{1}, x_{2}, ..., x_{n}\) such that \(f(x) = (x - x_{1})*(x - x_{2})*...*(x - x_{n}}\),
Which of the following is a polynomial with roots: − square root of 3 , square root of 3, and −2?
So
\(x_{1} = x_{2} = \sqrt{3}\)
\(x_{3} = -2\)
Then
\((x - \sqrt{3})^{2}*(x - (-2)) = (x - \sqrt{3})^{2}*(x + 2) = (x^{2} -2x\sqrt{3} + 3)*(x + 2) = x^{3} + 2x^{2} - 2x^{2}\sqrt{3} - 4x\sqrt{3} + 3x + 6\)
Since \(\sqrt{3} = 1.73\)
\(x^{3} + 2x^{2} - 3.46x^{2} - 6.93x + 3x + 6 = x^{3} - 1.46x^{2} - 3.93x + 6\)
The polynomial is \(x^{3} - 1.46x^{2} - 3.93x + 6\)
Please help me finish this problem it’s giving me trouble
Given
\(\begin{gathered} y=\frac{7}{5}x-\frac{3}{5}....Equation\text{ i} \\ \\ 7x-5y=8...Equation\text{ ii} \end{gathered}\)Solution
multiply all through by 5 equation
We have
\(5y=7x-3\text{ ...equation iii}\)\(\begin{gathered} Rearrange\text{ equation iii} \\ -7x+5y=-3 \\ \end{gathered}\)We have
\(\begin{gathered} -7x+5y=-3...Equation\text{ iii} \\ \end{gathered}\)Add equation ii and Equation iii
\(\begin{gathered} 7x-5y=8\text{ ....Equation ii} \\ -7x+5y=-3\text{ ....Equation iii} \end{gathered}\)We now have
\(0=5\)This means NO SOLUTION
Which of the following circles has an area greater than 400 square meters and less than 600 square meters? Use 3.14 for . Select all that apply
A Radius: 8 meters
B. Radius: 12 meters
C.Radius: 14 meters
D. Diameter. 12 meters
E Diameter 22 meters
F Diameter: 26 meters
PLZ HELP
Answer:
d
Step-by-step explanation:
Find the measure of arc BC given m<1 = 70°. Type a numerical answer in the space provided. Do not include any symbols, labels or
spaces in your answer.
Answer:
70°
Step-by-step explanation:
Because line segment OB and OC are both straight lines, then the measure of angle fromed by this two segments is the same in different locations.
The height of a kicked football can be represented by the polynomial –15t2 + 17t + 4, where t is the time in seconds. Find the factored form of the polynomial. PLZ ASAP
Answer:
(−5t−1)(3t−4)
Step-by-step explanation:
Factor −15t2+17t+4
−15t2+17t+4
=(−5t−1)(3t−4)
The factored form of the polynomial is (-3t+ 4) (5t + 1).
What is a polynomial?Polynomial is an equation written as the sum of terms of the form kx^n.
where k and n are positive integers.
We have,
-15t² + 17t + 4
-15t² + (-3 + 20)t + 4
-15t² - 3t + 20t + 4
-3t(5t + 1) + 4(5t + 1)
(-3t+ 4) (5t + 1)
Thus,
The factored form is (-3t+ 4) (5t + 1)
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A bakery did a survey among 100 customers to find their food preferences. The customers were asked about their preferences for
cupcakes or brownies. Out of the total 72 people who liked cupcakes, 37 also liked brownies. There were 59 people who liked
brownies.
Part A: Summarize the data by writing the values that the letters A to l in the table below represent.
Like Cupcakes
Do Not Like Cupcakes
Total
Like Brownies
A
D
G
Do Not Like Brownies
B
E
H
Total
C
F
I
Part B: What percentage of the survey respondents did not like either cupcakes or brownies?
Part C: Do the survey results reveal a greater dislike for brownies or cupcakes? Justify your answer.
Answer:
put 37, 22,59,35,6,41,72,28,100 in chart < That is for the ppl who cant click on the brainly site but it still shows alitttle
For the ppl who can click on brainly:
Part A:
Like Cupcakes
Do Not Like Cupcakes
Total
Like Brownies
37
22
59
Do Not Like Brownies
35
6
41
Total
72
28
100
Part b: 6
Part c: You really have to figure out how to word this 37- 72=35 35-41=6
hope it helps
how many different linear arrangements are there of the letters a, b, c, d, e, f for which (a) a and b are next to each other? (b) a is before b? (c) a is before b and b is before c?
Answer:
the total number of arrangement is six
Step-by-step explanation:
Part (a) Step 1. Find the no. of linear arrangements of the letters A, B, C, D, E, F such that A and B are next to each other.
Suppose A and B are together and form a group, then no. of groups are .
These groups can be arranged in
A and B can be arranged in .
Therefore, the possible no. of arrangements are .
Part (b) Step 1. Find the no. of linear arrangements of the letters A, B, C, D, E, F such that A is before B.
Total no. of arrangements with six letters
The no. of arrangements in which A is before B
Therefore, the possible no. of arrangements are .
Part (c) Step 1. Find the no. of linear arrangements of the letters A, B, C, D, E, F such that A is before B and B is before C.
Total no. of arrangements with six letters
A, B and C can be arranged in
Out of these 6 arrangements, there is only one arrangement in which A is before B and B is before C.
So, the possible no. of ways =
Therefore, the possible no. of arrangements are .
Part (d) Step 1. Find the no. of linear arrangements of the letters A, B, C, D, E, F such that A is before B and C is before D.
The no. of arrangements in which A is before B
Out of these arrangements, half will be with C before D and half will be with D before C.
Therefore, the possible no. of arrangements are .
Part (e) Step 1. Find the no. of linear arrangements of the letters A, B, C, D, E, F such that A and B are next to each other and C and D are also next to each other.
If A and B form one group and C and D from another group then there are groups and these groups can be arranged in
A and B can be arranged in
Similarly, C and D can be arranged in
Therefore, the possible no. of arrangements are .
Part (f) Step 1. Find the no. of linear arrangements of the letters A, B, C, D, E, F such that E is not last in line.
The no. of arrangements in which the position of E is fixed at last
The no. of arrangements in which the position of E is not fixed
Therefore, the possible no. of arrangements are
PLS HELP BEST ANSWER GETS BRAINLIEST\
A dog needs 4/3 liters of water for 2/5 of a day. How many liters of water does the dog need for an entire day? *
Answer:
A dog needs 4/3 liters of water 2/5 of a day, Therefore
he'll need 4/3 liters for 5/2 day or
4/3 * 5/2 = 20/6 = 10/3 liters or 3 and 1/3 liters per day
Step-by-step explanation:
Follow the instructions below..Write (20)4 without exponents.+(2a)* = 0Х5?Fill in the blanks.(zla)* = 120
Given the indices expression shown below;
\((2a)^4\)This can be simplified as:
\(\begin{gathered} (2a)^4=2^4a^4 \\ (2a)^4=2^2\times2^2\times a^4 \\ (2a)^4=4\times4\times a^4 \\ (2a)^4=16a^4 \end{gathered}\)This gives the resulting expression on expansion
what fraction is equivalent to -3/2
Answer:
-6/4
Step-by-step explanation:
-6/4 can be divided by 2 on both the numerator and the denomanator so it simplifies to -3/2
Answer:
-6/4, -9/6, -12/8...
Step-by-step explanation:
Just multiply the numerator and denominator by any number to get a fraction equivalent to -3/2. Also, don't forget the negative sign (-).
Hope this helped.
On a coordinate plane, a dashed straight line has a positive slope and goes through (negative 3, 1) and (0, 3). Everything to the left of the line is shaded.
Which linear inequality is represented by the graph?
On a coordinate plane, a dashed straight line has a positive slope and goes through (negative 3, 1) and (0, 3). Everything to the left of the line is shaded.
Which linear inequality is represented by the graph?
Answer:
2x-3y<-9
Step-by-step explanation:
There are 91 rooms in a hotel.52 rooms are reserved. What fraction of the rooms are reserved?
Answer Properly. Otherwise, I report you.
to find remaining rooms 91-52=39
turn into a fraction =39/91
answer=39/91
what is the slope of an equation of the line that passes through the point (3,-5) and has a slope of 0
Answer:
y=0x-5
Step-by-step explanation:
hope this helps :3
if it did pls mark brainliest
Find x in each triangle. PLZ ANSWER FAST!!!!!!!!!!!
Which of the following z-scores is NOT outside the middle 68% of the data for a normal distribution?
a.) -0.8
b.) -2.8
c.) 1.8
d.) 3.8
Answer:
Step-by-step explanation:
A, use three_digite rounding arithmetic to compute 13- 6 and determine the absolute,relative ,and percentage errors.
tepeat part (b) using three – digit chopping arithmetic.
Use the coordinates of the labeled point to find the point-slope equation of
the line.
A. y-5=-3(x+3)
B.y-3-(x+5)
C. y + 5 = 3(x+3)
D. y + 5 = -3(x-3)
(3,-5)
By using the coordinates of the labeled point, the point-slope equation of the line include the following: D. y + 5 = -3(x - 3)
How to determine an equation of this line?In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical equation (formula):
y - y₁ = m(x - x₁)
Where:
x and y represent the data points.m represent the slope.0 5 2 -2
First of all, we would determine the slope of this line;
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
Slope (m) = (4 + 5)/(0 - 3)
Slope (m) = -9/3
Slope (m) = -3
At data point (3, -5) and a slope of -3, a linear equation for this line can be calculated by using the point-slope form as follows:
y - y₁ = m(x - x₁)
y - (-5) = 3(x - 3)
y + 5 = -3(x - 3)
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
what is 999.09344471 rounded to the nearest square kilometer?
The nearest kilometers to 999.09344471 km is 1000 km.
Given value is 999.09344471 Km.
We have to calculate the round off value to the nearest kilometers. we know that after the decimal if the value of tenth place is 5 or bigger than 5 then we add 1 to the tens place digit, this is the fundamental rule of rounding off.
Now on following this rule from the very right hand side up to the tenth place digit we come to the conclusion that only the value after the decimal (934) is to be rounded off which is (900).
So 999.09344471 km is finally becomes 999.900 km after rounding of to nearest hundredth value.
Again rounding off 999.900 km to nearest km so it becomes 1000 km.
The nearest kilometers to 999.09344471 km is 1000 km.
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Is the event independent or overlapping:
A spinner has an equal chance of landing on each of its eight numbered regions. After spinning, what is the probability you land on region three and region six?
Mutually exclusive or independent:
A bag contains six yellow jerseys numbered 1-6. The bag also contains four purple jerseys numbered 1-4. You randomly pick a jersey. What is the probability it is purple or has a number greater than 5.
Mutually exclusive or overlapping:
A box of chocolates contains six milk chocolates and four dark chocolates. Two of the milk chocolates and three of the dark chocolates have peanuts inside. You randomly select and eat a chocolate. What is the probability that is is a milk chocolate or has no peanuts inside?
Mutually exclusive or independent:
You flip a coin and then roll a fair six sided die. What is the probability the coin lands on heads up and the die shows an even number?
The first question:
"A spinner has an equal chance of landing on each of its eight numbered regions. After spinning, what is the probability you land on region three and region six?"
Since the spinner has an equal chance of landing on each of its eight regions, the probability of landing on region three is 1/8, and the probability of landing on region six is also 1/8.
To find the probability of both events occurring (landing on region three and region six), you multiply the probabilities together:
P(landing on region three and region six) = P(landing on region three) * P(landing on region six) = (1/8) * (1/8) = 1/64.
Therefore, the probability of landing on both region three and region six is 1/64.
The events are mutually exclusive because it is not possible for the spinner to land on both region three and region six simultaneously.
--------------------------------------------------------------------------------------------------------------------------
The second question:
"A bag contains six yellow jerseys numbered 1-6. The bag also contains four purple jerseys numbered 1-4. You randomly pick a jersey. What is the probability it is purple or has a number greater than 5?"
To find the probability of either event occurring (purple or number greater than 5), we need to calculate the probabilities separately and then add them.
The probability of picking a purple jersey is 4/10 since there are four purple jerseys out of a total of ten jerseys.
The probability of picking a jersey with a number greater than 5 is 2/10 since there are two jerseys numbered 6 and above out of a total of ten jerseys.
To find the probability of either event occurring, we add the probabilities together:
P(purple or number greater than 5) = P(purple) + P(number greater than 5) = (4/10) + (2/10) = 6/10 = 3/5.
Therefore, the probability of picking a purple jersey or a jersey with a number greater than 5 is 3/5.
The events are overlapping since it is possible for the jersey to be both purple and have a number greater than 5.
--------------------------------------------------------------------------------------------------------------------------
The third question:
"A box of chocolates contains six milk chocolates and four dark chocolates. Two of the milk chocolates and three of the dark chocolates have peanuts inside. You randomly select and eat a chocolate. What is the probability that it is a milk chocolate or has no peanuts inside?"
To find the probability of either event occurring (milk chocolate or no peanuts inside), we need to calculate the probabilities separately and then add them.
The probability of selecting a milk chocolate is 6/10 since there are six milk chocolates out of a total of ten chocolates.
The probability of selecting a chocolate with no peanuts inside is 7/10 since there are seven chocolates without peanuts out of a total of ten chocolates.
To find the probability of either event occurring, we add the probabilities together:
P(milk chocolate or no peanuts inside) = P(milk chocolate) + P(no peanuts inside) = (6/10) + (7/10) = 13/10.
Therefore, the probability of selecting a milk chocolate or a chocolate with no peanuts inside is 13/10.
The events are mutually exclusive since a chocolate cannot be both a milk chocolate and have no peanuts inside simultaneously.
--------------------------------------------------------------------------------------------------------------------------
The fourth question:
"You flip a coin and then roll a fair six-sided die. What is the probability the coin lands heads up and the die shows an even number?"
The probability of the coin landing heads up is 1/2 since there are two possible outcomes (heads or tails) and they are equally likely.
The probability of rolling an even number on the die is 3
/6 or 1/2 since there are three even numbers (2, 4, and 6) out of a total of six possible outcomes.
To find the probability of both events occurring (coin lands heads up and die shows an even number), we multiply the probabilities together:
P(coin lands heads up and die shows an even number) = P(coin lands heads up) * P(die shows an even number) = (1/2) * (1/2) = 1/4.
Therefore, the probability of the coin landing heads up and the die showing an even number is 1/4.
The events are independent since the outcome of flipping the coin does not affect the outcome of rolling the die.
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x-intercept of 3 and y-intercept of 8
How do you write a lunar equation given this information and how do you write the equation in slope form
Answer:
y = -8/3x + 8
Step-by-step explanation:
Step 1: Identify which values we have and need to find in the slope-intercept form:
The general equation of the slope-intercept form of a line is given by:
y = mx + b, where
(x, y) is any point,m is the slope,and b is the y-intercept.Since we're told that the y-intercept is 8, this is our b value in the slope-intercept form.
Step 2: Find m, the slope of the line:
Since the x-intercept is 3, the entire coordinates of the x-intercept are (3, 0)Thus, we can find m, the slope of the line by plugging in (3, 0) for (x, y) and 8 for b:
0 = m(3) + 8
0 = 3m + 8
-8 = 3m
-8/3 = m
Thus, the slope is -8/3.
Therefore, the the equation of the line in slope-intercept form whose x-intercept is 3 and whose y-intercept is 8 is y = -8/3x + 8.
Optional Step 3: Check the validity of the answer:
We know that the entire coordinates of the x-intercept are (3, 0) and the entire coordinates of the y-intercept are (0, 8).Thus, we can check that we've found the correct equation in slope-intercept form by plugging in (3, 0) and (0, 8) for (x, y), -8/3 for m, and 8 for b and seeing if we get the same answer on both sides of the equation when simplifying:
Plugging in (3, 0) for (x, y) along with -8/3 for m and 8 for b:
0 = -8/3(3) + 8
0 = -24/3 + 8
0 = -8 = 8
0 = 0
Plugging in (0, 8) for (x, y) along with -8/3 for m and 8 for b;
8 = -8/3(0) + 8
8 = 0 + 8
8 = 8
Thus, the equation we've found is correct as it contains the points (3, 0) and (0, 8), which are the x and y intercepts.
You are running a fuel economy study. One of the cars you find is blue. It can travel
45 1/2 miles on 1 1/4 gallons
of gasoline. Another car is red. It can travel
24 4/5 on 4/5 gallons
of gasoline. What is the unit rate for miles per gallon for each car? Which car could travel the greater distance on 1 gallon of gasoline?
The unit rate for miles per gallon for each car will be 36.4 and 31. And the blue car can travel greater distances on 1 gallon of gasoline.
What is the rate?The rate is the ratio of the amount of something to the unit. For example - If the speed of the car is 20 km/h it means the car travels 20 km in one hour.
You are running an efficiency study. One of the vehicles you find is blue. It can travel 45 ¹/₂ miles on 1 ¹/₄ gallon of fuel. Another vehicle is red. It can travel 24 ⁴/₅ on ⁴/₅ gallons of fuel.
The rate of blue cars is given as,
⇒ (45 ¹/₂) / (1 ¹/₄)
⇒ 45.5 / 1.25
⇒ 36.4 miles per gallon
The rate of red cars is given as,
⇒ (24 ⁴/₅) / (⁴/₅)
⇒ 24.8 / 0.8
⇒ 31 miles per hour
The unit rate for miles per gallon for each car will be 36.4 and 31. And the blue car can travel greater distances on 1 gallon of gasoline.
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Product of (4a+6b)(a-b)
Answer:Simplifying
(4a + 6b)(a + -1b) = 0
Multiply (4a + 6b) * (a + -1b)
(4a * (a + -1b) + 6b * (a + -1b)) = 0
((a * 4a + -1b * 4a) + 6b * (a + -1b)) = 0
Reorder the terms:
((-4ab + 4a2) + 6b * (a + -1b)) = 0
((-4ab + 4a2) + 6b * (a + -1b)) = 0
(-4ab + 4a2 + (a * 6b + -1b * 6b)) = 0
(-4ab + 4a2 + (6ab + -6b2)) = 0
Reorder the terms:
(-4ab + 6ab + 4a2 + -6b2) = 0
Combine like terms: -4ab + 6ab = 2ab
(2ab + 4a2 + -6b2) = 0
Solving
2ab + 4a2 + -6b2 = 0
Solving for variable 'a'.
Factor out the Greatest Common Factor (GCF), '2'.
2(ab + 2a2 + -3b2) = 0
Factor a trinomial.
2((a + -1b)(2a + 3b)) = 0
Ignore the factor 2.
Subproblem 1
Set the factor '(a + -1b)' equal to zero and attempt to solve:
Simplifying
a + -1b = 0
Solving
a + -1b = 0
Move all terms containing a to the left, all other terms to the right.
Add 'b' to each side of the equation.
a + -1b + b = 0 + b
Combine like terms: -1b + b = 0
a + 0 = 0 + b
a = 0 + b
Remove the zero:
a = b
Simplifying
a = b
Subproblem 2
Set the factor '(2a + 3b)' equal to zero and attempt to solve:
Simplifying
2a + 3b = 0
Solving
2a + 3b = 0
Move all terms containing a to the left, all other terms to the right.
Add '-3b' to each side of the equation.
2a + 3b + -3b = 0 + -3b
Combine like terms: 3b + -3b = 0
2a + 0 = 0 + -3b
2a = 0 + -3b
Remove the zero:
2a = -3b
Divide each side by '2'.
a = -1.5b
Simplifying
a = -1.5b
Solution
a = {b, -1.5b}
Step-by-step explanation:
What day comes three days after the day which comes two days after the day which comes immediately after the day which comes two days after Monday?
Answer:
Step-by-step explanation:
Tuesday
Answer: Tuesday
Step-by-step explanation:
Second after Monday is Wednesday and then immediately is Thursday and second after Thursday is Saturday after which three days is Tuesday.
Find the distance between the points (4,-3) and (5,1)
Distance =
Answer:
d = sqrt(17)
Step-by-step explanation:
d = sqrt( x2 - x1)^2 + (y2 - y1)^2 )
d = sqrt( (4 - 5)^2 + (-3 - 1)^2 )
d = sqrt( (-1)^2 + (-4)^2 )
d = sqrt ( 1 + 16)
d = sqrt(17)
is the ordered pair a solution to the equation. y=-7; (-5,6)
Answer: No
To check if (-5,6) is a solution to the equation y=-7, we need to substitute -5 for x and 6 for y in the equation.
If the equation is true, then the ordered pair is a solution to the equation.
If we put (-5,6) into y=-7, we get 6=-7, which is not true.
So, (-5,6) is not a solution to the equation y=-7.
How many four-digit numbers with a sum of their digits equal to 2 are there?
Answer:
Step-by-step explanation:
21
A chef at a restaurant uses 19 pounds of butter each day. About how many grams of butter does the chef use each day? Use the conversion factors
28.4 grams
1 ounce
16 ounces
1 pound
and
Using the conversion factors, 454 grams of butter is used by the chef each day.
What are conversion factors?A conversion factor is a number that is used to multiply or divide one set of units into another. If a conversion is required, it must be done using the correct conversion factor to get an equal value. For instance, 12 inches equals one foot when converting between inches and feet.So, grams of butter used each day:
19 pounds = 8618.26 gramsThen,
1 pound = 8618.26/191 pounds = 453.592 gramsRounding off: 454 gramsTherefore, using the conversion factors, 454 grams of butter is used by the chef each day.
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The correct question is given below:
A chef at a restaurant uses 19 pounds of butter each day. About how many grams of butter does the chef use each day? Use the conversion factors
The equation z = 30x represents a(n) _____ variation.
a. direct
b. joint
c. inverse
d. combined
The equation z = 30x represents a direct variation the two variables, z and x, are directly proportional to each other. a.
Direct variation can be defined as a relationship between two variables where their values increase or decrease at the same rate.
In the case of the given equation, as x increases, z also increases proportionally.
Similarly, if x decreases, z will also decrease proportionally.
Direct variation can be represented as y = kx, where y and x are the variables, and k is the constant of variation.
In the given equation, we can see that z is the dependent variable, and x is the independent variable.
We can rewrite the equation as z = kx, where k = 30.
To understand how direct variation works, let's consider an example. Suppose we have an equation y = 5x, where y represents the cost of buying x apples at $5 per apple.
Here, the cost of buying apples is directly proportional to the number of apples purchased.
For instance, if we buy 10 apples, the total cost will be 10 × $5 = $50.
Similarly, if we buy 20 apples, the total cost will be 20 × $5 = $100.
Thus, we can see that the cost increases as the number of apples purchased increases, and vice versa.
The given equation z = 30x represents a direct variation is a type of relationship between two variables where their values increase or decrease proportionally.
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