6a + 3b for a = 7 and b = 11
6(7) + 3(11)
42 + 33
75
hope this helps
Answer:

Step-by-step explanation:
Let x be the amount of dough required for small pizza, y be the amount of dough required for medium pizza and z be the amount of dough required for large pizza.
As per the question , we have

Hence, the equation for the question with the variable representing the amount of dough needed for small pizza.

Answer:
It is B 40.
Step-by-step explanation:
60+x+2x=180
120=3x
x=40
Answer:
To complete this chart, all you have to do is replace the numbers in the "x" column with the variable "x" in the expressions. Here's what I mean.
For the problem "13-x", replace "x" with the 2. Replace the x with the 2 for the rest of the problems. Then repeat the substitution method (chart is attached so you can see what I mean) with the numbers 4, 6, 8, 10, and 12.
Im pretty sure it would be 10??? if you are putting it as a subtraction problem if not i would try wording it more clearly