Question

help!!!!
will medel and fan

What is 19x^2 + 25x^2 ?

a. 45x^4
b. 45x^2
c. 44x^4
d. 44x^2

What is (5x)(14x^3)?
Select one:
a. 70x^3
b. 19x^3
c. 70x^4
d. 19x^4

Simplify the expression: -4x^2(3x-7)

a. -12x^3 + 28
b. -12x^3+ 28x^2
c. -12x^3 - 28x^2
d. -12x^3 -28

Answer 1

Since 19 and 25 have the same variable you are allowed to add them.

You have to multiply for the second: 5x*14x^3=\(\color{red}{5*14*x*x^3} \)

Distribute for the last one: \((-4x^2)(3x) + (-4x^2)(-7) \)

Answer 2

So 1 is d

Answer 3

2 is 70^4

Answer 4

Right so far :)

and \(70x^4\) yes xD

Answer 5

thanks i fiured it out