Step-by-step explanation:
any inequality with an "or equal" condition.
because that means the points on the boundary line are included, and then we draw it as a solid line.
so, it seems the 4th answer is such a case.
Solve the problems.
The number a is less than the number b by (1)/(5) of b. By what part of a is b greater than a ?
Answer:
B is greater than A by 1/4 of A
Step-by-step explanation:
Let's use the information given in the problem to write expressions for the values of a and b:
a = b - (1/5)b = (4/5)b
b is greater than a by the difference:
b - a = b - (4/5)b = (1/5)b
To express this difference as a fraction of a, we divide by a:
(b - a)/a = ((1/5)b)/((4/5)b) = 1/4
Therefore, b is greater than a by 1/4 of a.
A person is taking a 13-question multiple-choice test for which each question has three answer choices, only one of which is correct. The person decides on answers by rolling a fair die and marking the first answer choice if the die shows 1 or 2, the second if it shows 3 or 4, and the third if it shows 5 or 6. Find the probability that the person gets fewer than 3 correct answer
The probability of getting fewer than 3 correct answers is 0.1385
How calculate the probability of getting fewer than 3 correct answers?
This is a binomial problem with n = 13
Since we are dealing with a binomial probability distribution. We are going to use the binomial distribution formula for determining the probability of x successes:
P(x = r) = nCr . p^r . q^n-r
total choices = 13 x 3 = 39
p = P(correct answer) = 13/39 =1/3
Given: n = 13, p = 1/3, q = 1- 1/3 = 2/3
Fewer than 3 correct answers mean less than 3 correct answers
P(x<3) = P(x = 0) + P(x=1) + P(x=2)
P(x<3) = (13C0 × (1/3)^0 × (2/3)^13-0) + (13C1 × (1/3)^1 × (2/3)^13-1 + (13C2 × (1/3)^2 × (2/3)^13-2)
= 0.005138 + 0.0333 + 0.1001
= 0.1385
Therefore, the probability that the person gets fewer than 3 correct answers is 0.1385
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the product of two rational numbers is 9.6 if one rational number is 66/7. find the other rational number
Answer:
0.1714
Step-by-step explanation:
just substract 9.6 from 66/7 which will give u the other rational number.
then add both the rational numbers to check ur answer.
66/7 + 0.1714 = 9.6
Please solve for x and is it complementary or supplementary
A primary school are carpeting a classroom.
The room is 9 metres by 7 metres.
The carpet is £29 per square metre.
Calculate the cost of the carpet.
Answer:
6 metres
Step-by-step explanation:
calculate the 9 and 7
branlies me pls
Step by step east way to do composition of functionF(x)=10-x^3 what is the input,or independent variable
X is the input or independent variable
while f(x) is the ouput or dependend variable
please answer all the questions for brainliest and 40 points also if you don't answer the question on correctly I will report and you will not get anything
1. Patrick made a scale drawing of a newly planned hotel.
The height of the scale drawing is 27 inches. The actual height of the hotel would be _________ ( Responses: 54, 243, 270, 600) _________ meters.
2. Mr. Twain asked the students in his class to redraw the figure below using a scale factor of 3. Then, he asked students to tell him one of the new side lengths of the figure. Some student responses are below.
Student Response
Mark 5 in.
Samantha 6 in.
Divia 1.3 in.
Cheng 0.9 in.
Candice 11.7 in.
Select the student that answered Mr. Twain's question correctly.
A. Mark
B. Divia
C. Cheng
D. Candice
3. Louis is constructing a scale model of a regulation size soccer field that measures 90 meters wide and 120 meters long. If the longest side of his model is 24 cm long, what is the width of the model?
A. 4.5 cm
B. 18 cm
C. 22.5 cm
D. 32 cm
4. Two sides of a triangle are 2 inches and 7 inches. Which could be the length of the third side? Select Yes or No for each measurement.
Yes No
5 inches
6 inches
8 inches
10 inches
5. A triangle has a side 3.5 inches in length, a 34° angle, and a 49° angle. Which of the following statements about this triangle are false? Select two that apply.
A. This triangle must have two sides that are 3.5 inches in length.
B. This triangle is an obtuse triangle.
C. This triangle could be a scalene triangle.
D. This triangle is an isosceles triangle.
6. Select the figure that can be formed when a cube is cut by a plane parallel to its base.
A. line
B. square
C. trapezoid
D. triangle
7. Select all figures that can be formed when a rectangular pyramid is cut by a plane parallel to its base.
A. point
B. rectangle
C. trapezoid
D. triangle
8. This is a cylinder.
Select all figures that can be formed by a vertical slice perpendicular to the bases of the cylinder.
A. circle
B. line segment
C. rectangle
D. oval
9. A family just removed a big tree from their backyard. The diameter of the circular hole left behind is 7 feet across. Approximately how many square feet of grass will the family need if they want to cover the area where the tree once was?
A. 22 ft²
B. 39 ft²
C. 44 ft²
D. 154 ft²
Answer:
2. is b
3.is d
4.is b
5
Step-by-step explanation:
I've done these before
have a good grade
The radius of a circle is 4 miles. What is the length of a 45° arc?
45°
r=4 mi
The length of a 45° arc with a radius of 4 miles is approximately 3.14 miles, calculated using the formula for arc length.
To determine the length of a 45° arc given a radius of 4 miles, we can use the formula: Arc length = (angle measure / 360°) x 2πr, where r is the radius of the circle and π is a constant equal to approximately 3.14.
Substituting the given values into the formula, we get: Arc length = (45° / 360°) x 2π(4 mi)Arc length = (1/8) x 2π(4 mi)Arc length = (1/8) x 8π Arc length = π
The length of the 45° arc is approximately 3.14 miles.
Summary: To find the length of a 45° arc of a circle, we use the formula: Arc length = (angle measure / 360°) x 2πr. Given a radius of 4 miles, we can substitute the values into the formula to get the length of the 45° arc, which is approximately 3.14 miles.
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describe the relationship between the graph of y = |x+3| and the graph of y = |x| in terms of a vertical and a horizontal translation. the graph y = |x+3| -4
The relationship between the graph is translation by 3 units left
How to determine the relationship between the graphThe graph of y = |x+3| can be obtained from the graph of y = |x| by applying a horizontal translation of 3 units to the left.
Specifically, the graph of y = |x+3| is identical to the graph of y = |x| shifted to the left by 3 units.
Hence, the graph of y = |x+3| can be obtained from the graph of y = |x| by shifting the latter 3 units to the left, resulting in a horizontal translation.
The graphs are otherwise identical in shape and orientation.
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What is the volume of the prism?
Enter your answer, as a mixed number in simplest form, in the box.
Answer:
\(115 \dfrac{1}{2}\:cm^3\)
Step-by-step explanation:
The volume of a rectangular prism is the product of each of the sides of the prism
Given the sides have lengths
\(3\dfrac{1}{2}, 6 \;and\; 5 \dfrac{1}{2} cm\)
the volume would be
\(3\dfrac{1}{2} \times 6 \times 5 \dfrac{1}{2}\)
To perform this multiplication, convert mixed fractions to improper fractions first
Use the rule that mixed fraction
\(a\dfrac{b}{c}=\dfrac{a\times \:c+b}{c}\)
\(3\dfrac{1}{2}=\dfrac{3\times 2+1}{2} = \dfrac{7}{2}\)
\(5\dfrac{1}{2}=\dfrac{5\times 2+1}{2}= \dfrac{11}{2}\)
Therefore
\(3\dfrac{1}{2}\times \:6\times \:5\dfrac{1}{2}\\\\= \dfrac{7}{2}\times \:6\times \dfrac{11}{2}\\\\= \dfrac{7}{2}\times \dfrac{6}{1}\times \dfrac{11}{2} \quad(6 = \dfrac{6}{1})\)
\(=\dfrac{7\times \:6\times \:11}{2\times \:1\times \:2}\\\\= \dfrac{462}{4}\\\)
Divide numerator and denominator by 2 to get
\(\dfrac{231}{2}\\\)
Convert improper fraction \(\dfrac{231}{2}\) to mixed fraction using quotient/remainder
\(\dfrac{231}{2} \\\\\rightarrow Quotient: 115\\\\\rightarrow Remainder = 231 - 115 \times 2 = 231 - 230 = 1\)
\(\dfrac{231}{2} = 115 \dfrac{1}{2}\)
I am struggling can I please have help?
Each is a half of an apple, and there are 8 apples.
A factor is what you multiply.
So since there are 8 halves, you would do 8 x 1/2.
The answer to that equation is 4.
So that's how you get your answer, I hope this helps!
What is the Domain of f(x) = -x^3 + 6x^2 -10x + 4
We can say that the domain of f(x) is (-∞, ∞), which means that any real number can be plugged into the function and it will produce a valid output.
What is function?
In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.
The function f(x) = -x³ + 6x² -10x + 4 is a polynomial function, which means that it is defined for all real values of x. Unlike some functions (such as square roots or logarithms) which have restrictions on their input values, a polynomial function can take any real number as an input.
To express the domain of the function in interval notation, we use the notation (-∞, ∞), which represents all real numbers. The symbol ∞ stands for infinity, and the open interval notation with the parentheses indicates that there are no specific endpoints for the domain; it extends indefinitely in both directions along the real number line.
Therefore, we can say that the domain of f(x) is (-∞, ∞), which means that any real number can be plugged into the function and it will produce a valid output.
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Which of the following represents e5 rounded to the nearest thousandth?
Answer:
C. 148.413
Step-by-step explanation:
Hope it helps!!!
Brainliest pls!!!Answer: c
Step-by-step explanation:
Which expression is equivalent to 9 Superscript 5?
9 times 5
5 times 5 times 5 times 5 times 5 times 5 times 5 times 5 times 5
9 times 9 times 9 times 9 times 9
9 times 9 times 9 times 9 times 9 times 5 times 5 times 5 times 5 times 5 times 5 times 5 times 5 times 5
Answer:
9 x 5
5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 = 5^9
9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 = 9 ^ 10
5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 = 5^9
5^9 x 9^10 x 5^9
5^18 x 9^10
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
An urn contains 4 black and 5 white balls. A ball is drawn at random and then replaced, and then a second ball is drawn. Find the probability that the first is black and the second iswhite.
Answer:
\(Probability = 0.2470\)
Step-by-step explanation:
Given
\(Black = 4\)
\(White = 5\)
\(Total = 9\) i.e. 5 + 4
Required
Determine \(P(Black\ and\ White)\)
In probability;
\(P(A\ and\ B) = P(A) * P(B)\)
So:
\(P(Black\ and\ White) = P(Black) * P(White)\)
i.e. multiply the probability of selecting black by that of selecting white
\(P(Black\ and\ White) = \frac{n(Black)}{Total} * \frac{n(White)}{Total}\)
\(P(Black\ and\ White) = \frac{4}{9} * \frac{5}{9}\)
\(Probability = \frac{20}{81}\)
\(Probability = 0.2470\)
A camera is capable of snapping (3/4) of a picture per. how long will take the camera to snap 6 picture
Past experience indicates that the standard deviation of the time it takes for a dentist to perform dental scaling for patients is 4 minutes. A researcher wishes to estimate the mean time to perform dental scaling with 95 percent confidence and a margin of error of ± 0.75 minutes. Given this, what must the sample size be? Round up your answer to the next whole number.
Answer:
n = 110
Step-by-step explanation:
Margin of Error :
Zcritical * s/ sqrt(n)
s = standard deviation = 4
Margin of Error = ±0.75
Zcritical at 95% level of confidence = 1.96
Margin of Error = Zcritical * s/ sqrt(n)
0.75 = 1.96 * 4 / sqrt(n)
0.75 = 7.84 / sqrt(n)
Take the square of both sides
0.5625 = 61.4656 / n
0.5625 * n = 61.4656
0.5625 = 61.4656
n = 61.4656 / 0.5625
n = 109.27217
About 110 samples
Three of the four points below are on the graph of a proportional relationship between the variables x and y. Which point is NOT on the graph?
A. (4,9)
B. (5, 11.25)
C. (6, 11)
D. (7, 15.75)
There are three different colored candies:
red, green, and white. The probability of
selecting a red candy is 2/5 and the probability
of selecting a green candy is 1/4 What is the
probability of selecting a white candy?
PLEASE HELP
Answer:
7/20
Step-by-step explanation:
add the probabilities together and minus it by the LCM which is 20
Finding the Derivative
Answer:
Step-by-step explanation:
\(f(x)=4x^5 lnx\\f'(x)=4 *5 x^4 lnx+4x^5*\frac{1}{x} \\f'(x)=20 x^4 ln x+4x^4\)
x/3 = 9 please help whats supposed to go on top
The value of x in the equation x/3 = 9 is 27
What is linear equation?A linear equation is an algebraic equation where each term is either a constant or a variable raised to the first power. In other words, none of the exponents can be greater than 1. For example, x² is a variable raised to the second power, but x is a variable raised to the first power.
Example of linear equation with two variables is 2x + y = 5, where x and y are the variables . 5x + 2 = 6 is an example of linear equation with one variable
in the expression x/3 = 9
We multiply both sides by 3
therefore x/3 × 3 = 9 × 3
x = 27
therefore the value of x in the equation x/3 = 9 is 27
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what the length of CE?
Answer:
CE = 3.5
Step-by-step explanation:
10 = 5
25 = x
x = 12.5 perimeter of DCE
4+5+x=12.5
x = 3.5
-12x^5y^2y(10x^3y^4)
-120x^8y^7
To simplify the expression, you can use the product rule of exponents, which states that when you multiply two terms with the same base, you add the exponents.
Here, we have:
-12x^5y^2y(10x^3y^4)
= -12 * 10 * x^5 * x^3 * y^2 * y^5 (using the product rule to simplify y^2 * y^4 to y^6)
= -120x^8y^7 (using the product rule to simplify x^5 * x^3 to x^8)
Therefore, the simplified expression is -120x^8y^7.
Determine the solutiong to the equation. -8x - 2(7 + 2x) = -6(2x + 5) A. No solution B. One solution C. Infinite
your answer is
C. infinite
good luck :)
Find the value of x.
110
(4x +90)°
x = [?1°
x=5
steps
they are vertical angles
they are equal
4x+90=110
4x=20
x=5
Answer:
Step-by-step explanation:
9900
Please help me answer this
Answer:
the first.option is the right answer
1 The figure shows a rectangle inscribed in a circle.
Determine the area of the shaded region. Use 3.14
for and round to the nearest tenth.
Answer:
46.8 cm²
Step-by-step explanation:
The diagonal of the square has length \(\sqrt{6^2+10^2}=2\sqrt{34}\). Therefore, the radius of the circle is \(\sqrt{34}\), meaning the area is \(\pi(\sqrt{34})^2 \approx 34(3.14)=106.76\).
The area of the rectangle is \((6)(10)=60\) cm².
Subtracting the areas, the answer is 46.76 cm², which is 46.8 cm² to the nearest tenth.
You have $3000 to enclose a rectangular piece of property with a fence. The fence costs $9 per foot. A scale drawing of the property has a length of 8 inches and a width of 7 inches. The scale is 1 in. : 12 ft. How much will it cost to enclose the property with the fence? Do you have enough money?
Answer:
Step-by-step explanation:
C=9P
P=2(L+W)
C=18(L+W)
C=18(8(12)+7(12))
C=18(96+84)
C=18(180)
C=$3240
So you do not have enough money to enclose the property.
If anyone can help with any of these probability questions, I'll give more points and brainiest!! Idaho Jones regains consciousness and next to her are 4 blodegradable packing peanuts. 5 seconds later each peanut has split in half, and each half grows into a full-size peanut. This repeats in the next 5 seconds. She sees a door with a keypad. A sign next to it has a timer indicating 10 seconds have passed and says the code is the number of peanuts when the timer reaches 100. (After 10 secords there were 16 peanuts.) Idaho realizes she must escape before then or the peanuts could suffocate her. Show how she figures out the code to open the door, and write what the code is
A mans
Idaho gets out and closes the door behind her. She is in a room with one exit, and the lock requires a key. There's a table with a briefcase that is also locked. It has a three-digit combination. The first part of the combination is on a wheel with all 10 digits. The second wheel has only 5 digits, and the third has 3 digits. How many combinations are possible?
150
combinations
The briefcase holds a key and out Idaho goes. She is met by an enchanted skeleton that directs her to a wall where a shelf has room for 5 books. The 5 ancient books are on the floor. She puts them on the shelf, but nothing happens. She realizes they must be put in the correct order. How many attempts will Idaho need to make if she doesn't get it right until her last attempt
Answer: let me explain!
Step-by-step explanation: So this might seem really confusing at first, but it’s actually suuuuuuper easy :P
So, if you think about it, every five seconds the amount of peanuts…well I don’t know how to explain it but let me show you this with numbers.
(4x2)x2x2x2 and so on. The number multiplies by two every five seconds from there. So figure out how many groups of five second there are in 100 seconds by dividing!
It’s 20!
So since 5 happens 20 times, and every time 5 happens, 2 happens, 2 also happens 20 times! (If that makes any sense)
So that answer would be 8x*twenty twos*
Which is…*drumroll please*
8,388,608
I even double checked!
And for the briefcase skeleton thing
She needs to try it 25 times because there are 5 books and each book can be switched with the other 4 times if the first one doesn’t work, therefore you need to multiply and the equation would be 5^2, or in other words, 25.
Don’t forget ur units!
Hope this helps :P
Falling objects can be modeled with quadratic functions. One student was thinking about this
and wondered what might happen in a few different situations.
They wondered if they could get on top of a 126 foot tall building and throw a tennis ball
straight up in the air as hard as they could, how long would it take for the ball to hit the ground.
Based on their knowledge of gravity and how fast they can throw a ball, they created the
following equation, which relates time, t, in seconds to height, h(t), in feet.
h(t) = -14t² + 56t+126
a. Find the vertex of the equation and explain what it means in this context.
b. Find the x-intercepts and y-intercept and explain what they mean in this context.
This student also wonders how long it will take the ball to reach the 6th floor, which
they measured to be 72 feet from the ground. Find the time it will take for the ball to reach 72 feet.
a. The x-coordinate of the vertex (2) represents the time it takes for the ball to reach its maximum height, and the y-coordinate (182) represents the maximum height itself.
b. The tennis ball is initially at a height of 126 feet above the ground.
How to calculate the valuea. The x-coordinate of the vertex is 2. To find the y-coordinate, we substitute this value back into the equation:
h(2) = -14(2)² + 56(2) + 126
h(2) = -14(4) + 112 + 126
h(2) = -56 + 112 + 126
h(2) = 182
Therefore, the vertex of the equation is (2, 182). In this context, the vertex represents the highest point reached by the tennis ball during its trajectory. The x-coordinate of the vertex (2) represents the time it takes for the ball to reach its maximum height, and the y-coordinate (182) represents the maximum height itself.
b. In order to find the y-intercept, we set t equal to zero and evaluate h(t):
h(0) = -14(0)² + 56(0) + 126
h(0) = 126
The y-intercept is 126. In this context, the y-intercept represents the initial height of the ball when it is thrown. Therefore, the tennis ball is initially at a height of 126 feet above the ground.
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