Express the following sums and summation notation.
pls help me, i need this for tomorrow
For question 6 the answer is 91 just add the numbers
Your fitness tracker overestimates the number of steps you take by 5%. The trackers indicates that you took 7350 steps today. Write and solve an equation to find the actual number of steps you took today.
The equation (1 + 0.05)x = 7350 to find the actual number of steps you took today will be 7,000.
What is the percentage?The quantity of anything is stated as though it were a fraction of a hundred. A quarter of 100 can be used to express the ratio. Per 100 is what the term percent signifies. The symbol ‘%’ is used to symbolize it.
Your fitness tracker overestimates the number of steps you take by 5%. The trackers indicate that you took 7350 steps today.
Let x be the actual number of steps. Then the equation will be given as,
(1 + 0.05)x = 7350
x = 7350 / 1.05
x = 7,000
The actual number of steps you took today will be
(1 + 0.05)x = 7350
x = 7350 / 1.05
x = 7,000
The equation (1 + 0.05)x = 7350 to find the actual number of steps you took today will be 7,000.
More about the percentage link is given below.
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The difference between two positive numbers is 40 and the ratio of these integers is 1:3.Find the integers.
Answer:
the two integers are 20 and 60
Step-by-step explanation:
Let x and y be two positive numbers ,where x < y.
• The difference between the two positive numbers x and y is 40.
Means
y - x = 40
• the ratio of these integers is 1:3
Means
y = 3x
We obtain these two equations:
y - x = 40
y = 3x
Solving the system of equations by substitution :
y - x = 40
y = 3x
⇔
3x - x = 40
y = 3x
⇔
2x = 40
y = 3x
⇔
x = 20
y = 3 × 20 = 60
3 5/8 + ( -5 1/4) =???
Answer:
-0.78125 or \(\frac{25}{32}\)
Step-by-step explanation:
Rewrite the decimal number as a fraction with 1 in the denominator
0.78125 = \(\frac{0.78125}{1}\)
Multiply to remove 5 decimal places. Here, you multiply top and bottom by 105 = 100000
\(\frac{0.78125}{1} . \frac{100000}{100000} = \frac{78125}{100000}\)
Find the Greatest Common Factor (GCF) of 78125 and 100000, if it exists, and reduce the fraction by dividing both numerator and denominator by GCF = 3125,
\(\frac{78125}{100000} . \frac{3125}{3125} = \frac{25}{32}\)
Answer:
your answer is 25/32.
Step-by-step explanation:
hope this helps you!
yea, i got another one..... i do not like geometry...
WILL GIVE BRAINIEST PLEASE ONLY ANSWER WITH AN ANSWER Solve these to the nearest hundredth i need it urgently for class. Those you attach work will get brainiest over those who do not though you don't have to
Answer
1 a=17 2 25 2/9 3 -7
4 5 6
7 8 9 10
by simplifying both sides of the equation, then isolating the variable.
Exact Form:
Step-by-step explanation:
Amber and Jessica go out for lunch. Amber’s lunch costs $11.70, and she tips 18%. Jessica’s lunch costs $12.30, and she tips 15%. Complete a true statement.
jessica paid [ 0.29 / 0.32 / 0.55 ] , [ more/ less ] than amber at lunch
Jessica paid more than Amber at lunch.
To find out, we first need to calculate the amount of tip each person left:
Amber's tip = 11.70 x 0.18 = $2.11
Jessica's tip = 12.30 x 0.15 = $1.85
Then we add the cost of the lunch and the tip for each person:
Amber's total cost = 11.70 + 2.11 = $13.81
Jessica's total cost = 12.30 + 1.85 = $14.15
So Jessica paid $0.34 more than Amber for lunch.
HELP ASAP WILL MARK BRAINLIEST!!!
use the image
Answer:
enlargement with a scale factor of 1.5
Step-by-step explanation:
divide 12 by 8 to get 1.5 and divide 9 by 6 to get 1.5
Answer: Enlargement x1.5
Step-by-step explanation:
from the image provided, the figure’s length and width have been increased (larger/smaller figure: width 12/8 = 1.5, length 9/6 = 1.5)
scale factor: 1.5
because both the length and width have increased, so does the area
therefore enlarging the shape
Ten children will share a bag of candy consisting of 78 pieces. Every child will receive the same number of pieces. What is the greatest number of pieces of candy each child can receive?
(This is division and has a reminder!)
Answer:
78÷10=7.8, so roughly 7-8 pieces of candy per child.
Answer:
The max that each chiles can receive is 7 pieces. This is because when you have a remainder in this type of equation that cannot pass it out without using fractions you keep it away.
Step-by-step explanation:
HELP PLEASE............................
Answer:
Ratio of red candies to blue candies = 3:5
Ratio of green candies to total candies = 7:15
Step-by-step explanation:
Item 3
Is this function linear or nonlinear?
y=2x²−4
linear
nonlinear
Answer:
B.nonlinear
Step-by-step explanation:
Please help me if u know the answer
Answer:
I believe the X is how many loads there are.
Step-by-step explanation:
just count how many did not use 1/4 tablespoons.
Answer:
5 loads more.
Step-by-step explanation:
It's simple!
It doesn't matter if the fractions have two different denominators. As long as the X is above 1/4, it counts.
This means that there are 5 loads that use more than 1/4 of a tablespoon of detergent.
I hope this helped!
Help what was the average change in elevation per min was ____ ft per min
Answer:
i do not know but i want to get more points so sorry
Step-by-step explanation:
An online retailer allows customers to rate items on a scale from −5 to 5. An item receives the scores below.
−1.75, −1.5, 4, −4.25, 3.75, 1.25, 2
Find the mean score. Write your answer as a decimal.
The mean score is (BLANK)
Answer: 0.5
Step-by-step explanation:
You have to add up all the scores then divide the total by how many sets of numbers there are, Ex; In this question, there are 7 sets of scores, so you divide the total by 7
Equation: -1.75 + (-)1.5 + 4 + (-)4.25 + 3.75 + 1.25 + 2 = 3.5
3.5 ÷ 7 = 0.5
Hope this helped!
A jar contains 2 red, 5 green, 2 blue and 6 yellow marbles. A marble is chosen at random from the jar. After replacing it, a second marble is chosen. What is the probability of choosing a green and then a yellow marble?
Answer:
Step-by-step explanation:
The probability of picking an item A in a box of N items depends on nA, the amount of items A in the box at the time of picking, with the kinda instinctive value:
p = nA / N
then it means that if you have no green ball, the probability is 0/N = 0, if you only have green balls, it means you have a probability of N/N = 1 = 100%, and if you have as many green balls as non-green balls, you have a probability of nA/(2nA) = 0.5 = 50%.
Here the probability of first picking a green ball (nG=5) in a box of N=3+5+2+6=16 for the 1st pick is:
pG1 = 5/16
Now the trick here is that once you picked the green ball, you put it back in the box before picking another ball. So you still have N=16 balls for the second pick, and the probability of picking a yellow ball (nY=6) for the 2nd pick is:
pY2 = 6/16 = 3/8
(it would have been slightly higher, at 6/15, if you did NOT put back the green marble in the box).
Now you want BOTH events to be true. So you want G1 to be true AND Y2 to be true. The two events are independent (the probability of Y2 is 6/16 if you had G1 but is also 6/16 if you failed G1), so the probability of having both is simply done by multiplicating them:
pG1Y2 = pG1 * pG2 = 15/128
Which of the following equations defines y as a function of x?
Use the best-fit line below to predict the value of y when x = 7
Answer:
the answer is 6 because when x=7 on the line it is also equal to 6 on the y axis
-3 + 6x. Which expression shows the correct factorization?
Here are the ones to pick from
1. -2 + -2 +6 +x
2. 6(-2 +x)
3. 6(-2 +x)
4. -3 (1 - 2x)
Answer:
Option #4
Step-by-step explanation:
Expand option #4
=-3(1-2x)
=-3 -2x*-3
=-3+6x which is what your original equation was.
please write a function for the points (1/3,0) (-2 3/4,0) and (0,-5) and explain the steps.
thank you!
The function for the points are y = -15x - 5
How to determine the functionFrom the information given, we have that;
The points are;
(1/3,0) (-2 3/4,0) and (0,-5)
Using the point-slope form of a linear equation, we have;
y - y₁ = m(x - x₁)
Such that;
m is the slope of the liney - y₁ and (x - x₁) are the pointsUsing (1/3, 0) and (0, -5), we have that the slope is;
m = (0 - (-5))/0 -1/3)
expand the bracket
= 5 / (-1/3)
= -15
Now, take any of the given points and substitute the values
Using (1/3, 0), we get;
y - 0 = -15(x - 1/3).
y = -15x - 5.
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The function for the points solved by (1/3,0) (-2 3/4,0) and (0,-5) solved by point slope form is \(a=-15b-5\)
We have given the points:
(1/3,0) (-2 3/4,0) and (0,-5)
Using the formula of linear equation
\(a-\)\(a_{1}\)\(=x[b-b_{1}]\)
Where we will consider (1/3,0) = \(a-a_{1}\) and (0,-5) = \(b-b_{1}\)
that is 1/3 = \(a\), 0 = \(a_{1}\) and
0 = \(b\), -5 = \(b_{1}\)
\(x\) refers to the slope of line (take any variable)
Now for finding the value of \(x\),
\(x=a-a_{1}/b-b_{1}\)
inserting the values,
\(x=[0-[-5]]/[0-1/3]\\x= -15\)
Substitute the value of \(x\) in the equation
\(a-0=-15[b-1/3]\)
By simplifying the equation, we get
\(a=-15b-5\)
To know more about functions and points:
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Name five fractions whose values are between 3/8 and 7/12
Answer:
convert them to decimasls
Step-by-step explanation:
convert thhem to decimals to make it easier
Answer:
1/2 2/4 4/8 6/12 9/18
Step-by-step explanation:
I need help finding out what properties were used in this equation, 4(x+5)=9x+4x-34
Answer:
Step-by-step explanation:
4(x+5)=9x+4x-34
4x + 4*5 = 9x + 4x - 34 {distributive property}
4x + 20 - 4x = 9x + 4x - 34 - 4x {subtraction property of equality}
20 = 9x - 34
20 + 34 = 9x - 34 + 34 {Addition property of equality}
54 = 9x
54/9 = 9x/9 {division property of equality}
6 = x
x = 6
Work out the size of angle m.
Answer:
78+25+61+55+64=283
360-283=77
180+77=257
20 divided by 8 as a fraction
i know this is prob really easy but i dont pay attention
i under stand if you need the points but please leave 1 of the things open so someone can actually answer, and please dont waste up the slots by saying , i dont know , or stuff please
Answer:
5/2 or 2 1/2
Step-by-step explanation:
Step-by-step explanation:
5/2 and 2 1/2...........
I need some one who is rlly good at math ;-;
20 POINTS DONT GUESS
The homeowners association wants to enclose the playground in
a fence. How much fencing will they need to purchase?
Is this question finding the area, circumference, or neither?
A. area
B. circumference
C. neither
Answer:
C) neither (unless the playground is a circle), you would want to know the perimeter
Step-by-step explanation:
(08.01 MC)
A cone has a volume of 24 cubic inches. What is the volume of a cyinder that the cone fits exactly inside of? (1 point)
Select one:
b. 24 in
c. 48 in
d. 72 in
Answer:
d. 72 in³
Step-by-step explanation:
To find the volume of a cylinder that a cone of volume 24 cubic inches fits in exactly inside of, we will follow the steps below:
From the question volume of the cone = 24 cubic inches
volume of a cone = \(\frac{1}{3}\) πr²h
and volume of a cylinder = πr²h
This implies
volume of a cone = \(\frac{1}{3}\) πr²h
= \(\frac{1}{3}\) (volume of a cylinder)
volume of a cone = \(\frac{1}{3}\) (volume of a cylinder)
24 = \(\frac{1}{3}\) (volume of a cylinder)
multiply both-side of the equation by 3
24×3 = \(\frac{1}{3}\) (volume of a cylinder)
72 =volume of a cylinder
Therefore volume of the cylinder that the cone fits exactly inside of is 72 cubic inches
Some students recorded how many minutes they spent on the phone in one day. They put the results in a Stem-and-Leaf Plot.
What is the mean number of minutes spent on the phone?
Explanation:
The data from the stem-and-leaf plot is:
10,
24,25,26,
30,30,32,33,
40,45,46
Add up those values
10+24+25+26+30+30+32+33+40+45+46 = 341
Then divide over n = 11 which is the sample size.
341/11 = 31 is the arithmetic mean.
Answer:
341/11 = 31 is the arithmetic mean.
Step-by-step explanation:
PLEASE HELP if can
(file below)
Answer: B ,hope it helps!
Show all work to identify the asymptotes and zero of the function f of x equals 4 x over quantity x squared minus 16.
Please explain with simple words! :)
Answer:
The zeros of a rational expression are the places where the numerator is zero:
4x = 0
x = 0
divide by 4
Ms. P collected data on the number of homeruns different baseball players had during their season. She collected the following data: 22, 64, 31, 83, 47, 49, 52, 57, 71, 82, 83
Least
Greatest:
Median:
Lower Q:
Upper Q:
Answer:
Least:22
Greatest: 83
Median: 57
Lower Q: i don't know what that means
Upper Q: I don't know what that means
Answer:
Least: 22
Greatest: 83
Median: 57
Lower Q: 47
Upper Q: 82
Step-by-step explanation:
Put the numbers in a line like this from least to greatest.
22, 31, 47, 49, 52, 57, 64, 71, 82, 83, 83
Please give me brainlist!