Answer:
it is 8
Step-by-step explanation:
7x+12+63=180
8x+12=180
Subtract 12 from both sides
8x= 168
=c=21
10x-40=50
Add 40 to both sides
10x=90
X=9
4x+72+2x-12=180
6x +60 =180
Subtract 60 from both sides
6x=120
X=20
Answer and Step-by-step explanation: An equation represents proportional relationship when dividing the quantities of the equation results in a quotient that is always the same. For example, in general:
Equation: y = mx
= m
m is a constant value, which means is the same.
A. Equation: 120 - x = L
Equation from alternative A is NOT proportional since the division of the quantities doesn't result in a constant.
B. Equation: 1.08p = t
Dividing total cost per item's price, will always give the sales tax, which is constant. So, this equation IS proportional.

C. Equation: 
This equation is proportional because dividing marbles per how much each sister gets, always gives the number of sisters:

D. Equation: 
This equation is NOT proportional because side length is squared, so it is not constant linearly.
Answer:
original size of Jay's bread dough is raised to 220%
Step-by-step explanation:
Let 1 be the original size of the bread
her bread dough is 11/5 of its original size.

The original size of the bread is raised to 2.2
To get percentage we multiply by 100
2.2*100 = 220%
original size of Jay's bread dough is raised to 220%
The greatest number of copies you can et for three dollars is 24.