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Harman [31]
2 years ago
10

Which expression is a factor of 21x2 + 13x – 20?

Mathematics
1 answer:
Paul [167]2 years ago
8 0

Answer: 7x-5

Step-by-step explanation:

Assuming the expression is 21^2 + 13x -20.

(7x-5)(3x+4)

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Answer:

Part 1) The rate of change is \frac{1}{3}

Part 2) The initial value is 12

Step-by-step explanation:

we know that

The linear equation in slope intercept form is equal to

y=mx+b

where

m is the slope or rate of change

b is the y-intercept or initial value

step 1

Find the slope or rate of change

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

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

we have the points

(3,13) and (6,14)

substitute the values in the formula

m=\frac{14-13}{6-3}

m=\frac{1}{3}

therefore

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step 2

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we have

m=\frac{1}{3}

point\ (3,13)

substitute in the equation y=mx+b

13=\frac{1}{3}(3)+b

solve for b

13=1+b

b=13-1=12 ---> initial value

The linear equation is equal to

y=\frac{1}{3}x+12

The y-intercept or initial value is 12

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