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erastova [34]
3 years ago
8

Can someone plz help me

Mathematics
1 answer:
AfilCa [17]3 years ago
5 0

Answer: 5a + 2b

Step-by-step explanation:

She purchased 12a pounds of apples and she used 7a pounds, so that means 12a - 7a = 5a

She purchased 4b pounds of bananas and used 2b pounds, so that means 4b - 2b = 2b

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What is the rate of change of the linear relationship modeled in the table (-2,5) (-1,4) (0,3) (1,2)
poizon [28]

The rate of change of the linear relationship is -1.

Explanation:

It is given that there is a linear relationship between all these points, these points lie on a straight line.

The equation to find the slope passing through two points \left(x_{1}, y_{1}\right) and \left(x_{2}, y_{2}\right) is given by

m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Substituting the points (-2,5) and (-1,4), we get,

\begin{aligned}m &=\frac{4-5}{-1+2} \\&=\frac{-1}{1} \\&=-1\end{aligned}

Thus, the slope is -1.

Thus, the rate of change of the linear relationship is -1.

8 0
3 years ago
HELP I WILL GIVE BRAINLEIST OR WHATEVER 50 POINTS​
Ilya [14]

answer:

a. scarf costs today = $6

b. scarf costs 3 days from now = $3

step-by-step explanation:

  • 1/2 off means you would multiply the amount by 1/2 then subtract

a. original price of scarf: $12

12 X 1/2 = 6

12 - 6 = 6

— scarf costs today = $6

  • do the same thing but this time it is a different number

b. 12 X 3/4 = 9

12 - 9 = 3

— scarf costs 3 days from now = $3

3 0
3 years ago
A leaf fell off a tree and floated toward the ground. What is the
pentagon [3]

Answer:

gravity

Step-by-step explanation:

the time it take to fall and force

3 0
3 years ago
1.928•10^7 in standard notation
Dafna11 [192]

Answer:

19280000

Step-by-step explanation:

5 0
3 years ago
A equation for (7,2) and (2,12)
alexira [117]

Well to find this line you want to know the slope and the y-intercept. So find the slope:

(y2-y1)/(x2-x1)

12-2 = 10

2-7 = -5

10/-5 = 2/-1

-2 is your slope

Now for y-intercept, find the point closest to the y-axis. That is the point (2,12), and if your slope is negative 2, that means that if you go up 4 and left 2, you should find the y-intercept:

12 + 4 = 16

16 is your y-intercept

So now lets write this out in an equation:

y = mx + b

m = slope

b = y-intercept

y = -2x + 16

there you go! hope this helps!

5 0
3 years ago
Read 2 more answers
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