Answer:
a^2 + 6^2:
3^2 + 6^2
9 + 36 = 45
answer: 45
a-b
3-4
-1
answer: -1
Step-by-step explanation:
Answer:

Step-by-step explanation:

We will start by using the quadratic formula.

We will simplify that and get:

So our answers would be:

Answer:
A. 7pi>21
Step-by-step explanation:
7*pi=21.99
21.99>21
Answer:
14 cm, 18 cm, 20 cm
Step-by-step explanation:
7x + 9x + 10x = 26x
equation: 26x = 52
divide each side by 26: x = 2
7 * 2 = 14
9 * 2 = 18
10 * 2 = 20
check if answer is right: 14 + 20 + 18 = 52
I hope this helped, please mark Brainliest thank you so much!!