Answer:
15
Step-by-step explanation:
magical it is 15 because it is what it is
1) it costs

so is D
2) the amount of the discount is -30%

so is A
3) -0.3

so is B
4) Chad paid 0.7

so is C
−13=7y+64
Step 1: Flip the equation.
7y+64=−13
Step 2: Subtract 64 from both sides.
7y+64−64=−13−64
7y=−77
Step 3: Divide both sides by 7.
7y
7
=
−77
7
y=−11
P=2
3p-1=5p-5-14+4p
3p-1=9p-19
-1=6p-19
18=6p
p=2
The radius of circle is 3.5 only