1st: 5x-20+2x (distribute the 5 to the numbers in the parenthesis) distribution property

2nd: 7x-20 (add like terms aka 5x and 2x) I believe commutative property of addition

Finished!

7 0

4 years ago

Find the value of x in the triangle below

stira [4]

Answer:

Step-by-step explanation

180=85+67+x

x=28

8 0

3 years ago

Is u(x) = –x + 3x2 – 8 a quadratic function

11111nata11111 [884]

Answer:

Step-by-step explanation:

A quadratic function is a polynomial in which the highest degree of its exponent is a 2, and it is in one variable only. So, yes, this is a quadratic, although it is not in descending form. Standard form for this would be

$u(x)=3x^2-x-8$

8 0

4 years ago