Answer: 39
Step-by-step explanation: formula is bh. 19.5 times 8 is 156. divide by 4 because a package will cover 4 sq ft.
To divide fraction you divide by the reciprocal of the number you are dividing by
so....
7/24 ÷ 35/48 = 7/24 * 48/35
then just simplify
Hope this helps!
Answer:
18 hours
Step-by-step explanation:
Answer:
Step-by-step explanation:
1) f(x) = 7 - 8x²
f(3) = 7 - 8*3²
= 7 - 8*9
= 7 - 72
f(3) = -65
2) f(a) = -5(a-2)
f(3) = -5(3 -2) = -5 * 1 = -5

4) f(m) = m(m +4)
f(3) = 3*(3+4) = 3 * 7 = 21