Answer:

Step-by-step explanation:
Use the distributive property of equality to multiply and get:

Simplify by combining like terms to get your end result:

The first five multiples of 9 are
9, 18, 27, 36, 45
Answer:
8.9
Step-by-step explanation:
Use Pythagorean Theorem (a²+b²=c²)
a²+8²=12²
a²+64=144
Subtract 64 to both sides
a²=80
Square root both sides
a=√80
√80≈8.9
Step-by-step explanation:
I hope you have a good day