Answer:
h = -4
Step-by-step explanation:
7h-5(3h-8) = 72
Distribute
7h - 15h +40 = 72
Combine like terms
-8h +40 = 72
Subtract 40 from each side
-8h+40-40 = 72-40
-8h = 32
Divide each side by -8
-8h/-8 = -32/-8
h = -4
Answer:
(a) 7/15
(b) 1/3
Step-by-step explanation:
(a) teaching:
(3 1/2) / (7 1/2) = (7/2) / (15/2) = 7/2 * 2/15 = 7/15
(b) marking:
(2 1/2) / (7 1/2) = (5/2) / (15/2) = 5/2 * 2/15 = 5/15 = 1/3
