(9x 2 −8)−(−4x 2 −5x)

1 3 2+ 5 − 8

Step-by-step explanation: It is 13x to the 2nd power plus 5x minus 8

-26x

Step-by-step explanation:

(9x 2 −8)−(−4x 2 −5x)

(9x)(2-8)-(4x)(2-5x)

^separating x so i can distribute but the ones that are sitting weirdly in the  parentheses (see how there isnt a sign separating 9x and 2? im going to seperate them via parentheses which is the same thing as adding a sign there. Same with -4x and 2)

we are going to distribute now. 9x*2, 9x*-8 -4x*2 -4x*-5x

(18x-72x) - (-8x+20x)

Its going to look like this ^

add or subtract the stuff in the parentheses

-54x+28x

-26x

1 3 5

step-by-step explanation:

i took the test: )

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length