Answer:
20
Step-by-step explanation: add them all together
<span>a=7b+8c+9d-10
a = 8c + 16d - 10
solve for c then
8c = a - 16d + 10
c = (</span>a - 16d + 10) / 8
or
c = a/8 - 2d + 5/4
Answer:
5.19
Step-by-step explanation:
first do 28.86 / 6 to find out how much each paid. then subtract that number (4.81) from 10
Answer:
5 nights
Step-by-step explanation:
Solve the inequality:
90x + 90(0.1)x + 12x + 30
600
Add like terms:
102x + 30 + 90(0.1)x
600
Isolate the variables:
102x + 90(0.1)x
570
102x + 9x
570
111x
570
x
5.13
So, the Lincolns can stay for 5 nights without exceeding $600