First u have to expand the brackets...
4 x 2z = 8z
4 x 3 = 12
8z + 12 = 12
Then you have to get numbers on one side, and letter on the other...
8z -12 = 12-12
8z = 0
then u have to divide 8z by 8 to find 1z or just z.
z = (0/8) = 0
z=0
Hope this helps :)
Answer:
A. 3x3x3x3 = 81 because you multiply 3 by itself 4 times
To solve this equation you need to find the value of x.
You can do this by using inverse operations.
and getting x alone.
x/4=5
the opposite of division is multiplication so we multiply 5 by 4
x=5*4
we now have x alone and must solve the rest of the equation
5*4=20
There for x=20
The recipe originally made 20 servings.
I hope this helped:) If you have any questions pleas comment and i will do my best to answer and/ or explain :)
Answer:

Step-by-step explanation:
A unit rate is the number of something there is per one unit of something else.
In this question, the unit rate is the number of miles per one hour.
1. Convert minutes to hours

2. Find the unit rate

Answer:
Options A, C and D are correct ones.
Step-by-step explanation:
Options A, C and D are correct.