Answer:
45
Step-by-step explanation:
The absolute value of negative 5 is 5 because it is five units away from zero, and then 9x5=45.
Answer:
2?
Step-by-step explanation:
2 is the square root of 4 since 2×2=4
Answer:
3
Step-by-step explanation:
mhm for your brother
anyways...
2x-3+6x = 21
Adding like terms
8x -3 = 21
Adding 3 on both sides
8x = 24
Dividing both sides by 8
x = 3
Remember that an exponent means repeated multiplication.
The exponent of 4 means you have four
's mutiplied together:

And then each exponent of 2 inside means you have two
's multiplied inside each set of parentheses.:

There are 8 b's there when you expand this out.