3:7 =
3/7
3/7 = x/35
7x = 105
x = 15
answer : clara borrowed 15 books
10x + 2y = -2
2y = -10x -2
y = -5x - 1 (slope is -5 and a parallel line will have the same slope)
y = mx + b
slope(m) = -5
12 = -5(0) + b
12 = 0 + b
12 = b
so the parallel line is y = -5x + 12
hope this helps, God bless!
Answer:
Step-by-step explanation:
10% of 80 = 8
80 - 8 = 72
if they are 10% off, the contact lenses will cost $72
