The expression x^2- x + 8.75 factors as (x + 2.5)(x - a) for some positive value "a". What is a? step by step, please.

3.5

Step-by-step explanation:

Write out quadratic

We are given that x+2.5 is a factor.

So our roots look like

Let apply the foil method to find some missing parts.

We know that the outer terms must multiply to 8.75. We also know that the middle terms must add up to -1.

The only number that satisfy this equation is

Since it already negative, it is

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2