2x+5y=21, x+y=3
y=3-x
2x+5y=21
2x+5(3-x) =21
2x+15-5x=21
2x-5x+15=21
-3x+15=21
-3x=21-15
-x=6/3
-x=2
x=-2
Answer: 14.29 or rounded up to 15%
Step-by-step explanation:
525 - 450 = 75
You need at least $75 off the price to have enough money.
75/525 = x/100
Solve for X
75 * 100 = 7500
7500/525 = 14.2857143
If answer should be a whole percentage you would need the discount to be 15% in order to not fall short on funds.
9 - 1 + x + 2 ( x )
9x - x + x2 + 2x
x2 + 10x
Answer:
a. 14
b. 10
c. 11
Step-by-step explanation:
You need to use the distance formula.

Ex: (1,2) and (1,16)
You will need to lable each
1st Point: 1 will be
and 2 will be 
2nd Point: 1 will be
and 16 will be 
Then you will need to plug it in
