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3 years ago

BRAINLIST!!!!! HELP PLEASE!!

Mathematics

2 answers:

Nady [450]3 years ago

8 0

we know that

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have

$A(-2,2)\ B(4,-1)$

Substitute the values

$m=\frac{-1-2}{4+2}$

$m=\frac{-3}{6}$

$m=-\frac{1}{2}$

therefore

the answer is the option B

$-\frac{1}{2}$

natita [175]3 years ago

5 0

Actually the rise is neg 1 and the run is pos 2 so -1/2 would be the answer

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Mr. Hedde requires 60% to pass. If someone gets 160 points and falls short by 20

olganol [36]

Answer:

300 points

Step-by-step explanation:

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3 years ago

Suppose that the probability density function ofthe length of computer cables is f (x) = 0.1 from 1200 to1210 millimeters.a. Det

Ann [662]

Notice that $f(x)=0.1$ for $1200\le x\le1210$ implies that $f(x)=0$ elsewhere, since

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$\operatorname{Var}[X]=E[(X-E[X])^2]=E[X^2]-E[X]^2$

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4 years ago

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marin [14]

Answer:

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Step-by-step explanation:

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4 years ago

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Delia is a graphic designer who charges an hourly rate. She made the graph to show her total earnings for various numbers of hou

stich3 [128]

Answer:

approximately 7 hours

see the explanation

Step-by-step explanation:

The picture of the question in the attached figure

Let

x ----> the time worked in hours

y ----> the amount earning in dollars

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem we have a proportional relationship

step 1

Find approximately how many hours would it take Delia to earn $250 ?

Looking at the graph

For y=$250 The value of x is approximately 7 hours

see the attached figure N 2

step 2

Find the exact value

from the graph take the point (5,175)

Find the value of k

$k=\frac{y}{x}$ ----> $k=\frac{175}{5}=\$35\ per\ hour$

The linear equation is

$y=35x$

For y=$250

substitute

$250=35x$

solve for x

$x=7.14\ hours$

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3 years ago