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Novay_Z [31]
3 years ago
9

Hello There!!~ (^人^) I need help please... Sasha noticed that the graph of the sales of yearbooks represented a proportional rel

ationship. How could she have calculated the constant of proportionality by looking at the graph? She could divide any y-value by its corresponding x-value. She could divide any x-value by its corresponding y-value. She could add any y-value to its corresponding x-value. She could subtract any x-value from its corresponding y-value. And, Make a Explanation please.... And, i may give out brainlist who ever have's a correctly answer. And, 46 points...
Mathematics
2 answers:
zzz [600]3 years ago
5 0

Answer:

Sasha can look at the graph and check to see that when she plots the points on the graph, they end up as a straight line. She can also draw a table to test the values and see if when you divide y/x you get the same answer for all of them.

Step-by-step explanation:

olganol [36]3 years ago
5 0

Answer: The answer is A.

She could divide any y-value by its corresponding x-value

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3. Let X = {0,1,2,3,4,5)
erica [24]

Answer:

Answer for A

Step-by-step explanation:

I don't know about B , Sorry for that.

7 0
3 years ago
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eric has a riddle: " i am thinking of a fraction that is equivalent to 2/5 and the numerator is 18 less than the denominator." w
dezoksy [38]

Answer:

12/30

Step-by-step explanation:

So we know that the denominator-numerator=18

And we also know that it's equal to 4/10 or 2/5.

Soooooooooooooo the most easiest is just to trial and error: 12/30

But I don't really know the more complex formula...

5 0
3 years ago
The distribution of heights for adult men in a certain population is approximately normal with mean 70 inches and standard devia
KengaRu [80]

Answer:

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12]

Step-by-step explanation:

I beleive those options corresponds to another question, i will ignore them. We want to know an interval in which the probability that a height falls there is 0.8.

In such interval, the probability that a value is higher than the right end of the interval is (1-0.8)/2 = 0.1

If X is the distribuition of heights, then we want z such that P(X > z) = 0.1. We will take W, the standarization of X, wth distribution N(0,1)

W = \frac{X-\mu}{\sigma} = \frac{X-70}{4}

The values of the cumulative distribution function of W, denoted by \phi , can be found in the attached file. Lets call y = \frac{z-70}{4} . We have

0.1 = P(X > z) = P(\frac{X-70}{4} > \frac{z-70}{4}) = P(W > y) = 1-\phi(y)

Thus

\phi(y) = 1-0.1 = 0.9

by looking at the table, we find that y = 1.28, therefore

\frac{z-70}{4} = 1.28\\z = 1.28*4+70 = 75.12

The other end of the interval is the symmetrical of 75.12 respect to 70, hence it is 70- (75.12-70) = 64.88.

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12] .

Download pdf
8 0
3 years ago
The gas tank of your car is 40% full. There are 8 gallons of gas in the tank. What is the capacity of the gas tank?
andreyandreev [35.5K]
Percentage by which the gas tank of the car is full = 40%
Amount of gas in the gas tank = 8 gallons
Let us assume the capacity of the gas tank = x gallons
Then
40% * x = 8
(40/100) * x = 8
4x/10 = 8
4x = 8 * 10
4x = 80
x = 80/4
   = 20 gallons
So the total capacity of the gas tank of the car is 20 gallons. I hope the procedure is clear to you.
7 0
4 years ago
Read 2 more answers
A farmer uses 1/3 of his land to grow corn and 1/4 to grow yams . What fraction of the land is left?
choli [55]

Answer:

7/12

Step-by-step explanation:

3*4=12. 4/12+3/12=7/12.

5 0
3 years ago
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