Which polynomial is equal to (4x^2+3x-1)+(-3x^2-5x-8)?

In adding two polynomials, you have to remember that you can only add like terms. Like terms are terms that the same variable and exponent.

The expression would become like this:

4x^2 +3x – 1+ -3x^2 – 5x – 8

Now, you should add the like terms:

x^2 – 2x – 9

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is