Set number 1, 2, 3, and 4 or (a,b,c,d) is a function
EXPLANATION:
in a function you can’t have two of the same x values.
hope this helped :)
Answer:

Step-by-step explanation:
we know that
The volume of the square pyramid is equal to

we have
----> the length of the base of the square pyramid
---> the height of the pyramid
substitute the values in the formula


There are 30.48 centimeters in a foot
5(2x-8)+15=-15 -15 in both sides
5(2x-8)=-30 /5
2x-8=-6 +8
2x=2 /2
x=1
I hope it helps