B = 1/4c + 14
d = 5/4c - 2
b = d
1/4c + 14 = 5/4c - 2
1/4c - 5/4c = -2 - 14
-c = - 16
c = 16 <=== chris got 16 correct
b = 1/4c + 14
b = 1/4(16) + 14
b = 4 + 14
b = 18 <=== Brian got 18 correct
d = 5/4c - 2
d = 5/4(16) - 2
d = 20 - 2
d = 18 <=== damien got 18 right also
Each ruler would cost about 9 cents
75%= 3/4
120*4=480
480/3=160
160/10=16
16*4=64
Hope you understand it
Answer:
(3,-1)
Step-by-step explanation:
1) Solve equation for y
2) Plug into other equation
3) Solve for x
4) Plug in the value found for x
5) Solve for y