Answer:
Both x = -1 and x = -7 are true solutions.
Step-by-step explanation:
Given

Required
Solve

Take square of both sides

Open bracket

Express as:


Expand

Factorize

Factor out x + 7

Solve:

So:

Answer:
12 1/5
Step-by-step explanation:
5 can go into itself one time and 5 can go into 25 5 times hope that makes sense
Answer:
42
Step-by-step explanation:
f(-5) = -9 × (-5) - 3 = 45 - 3 = 42
If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)
Answer:
36 to 12
Step-by-step explanation:
subtract 12 from 48 an you get 36 girls