Answer:
C
Step-by-step explanation:
Given
3
= 24 ( divide both sides by 3 )
= 8
Raise both sides to the power of 
x + 9 =
=
=
= 16 ( subtract 9 from both sides )
x = 7 → C
Answer:
B
Step-by-step explanation:
4x-5y=2 ...(1)
10x-21y=10 ...(2)
(1)+2(2) gives
24x-47y=22
Hello!
For this you can plug in the x values in the choices and see if you get the y value
y =

-4^3 is -64
when you subtract a negative you are just adding
-64 + 4 = 60
Then you do the second one

-3^3 is -27
-27 + 3 is -24
Then the third one

-2^3 is -8
-8 + 2 is -6
Then the last one

-1^3 is -1
-1 + 1 = 0
Since we did not get -2 the answer is D
Hope this Helps!
Answer: 1:4
Step-by-step explanation:
3:12 written as a fraction is 3/12
Simplify:
3/12 = 1/4
10 + 15x + x + 10
= 16x + 20