Answer:
D. 2.96
Step-by-step explanation:
1 foot is 30.48 cm
Answer:
Length = 10 inches
Width = 5 inches
Step-by-step explanation:
p = 2w + 2l
l = w + 5
30 = (2w + 2(w + 5))
30 = 4w + 10
20 = 4w
w = 5
l = w + 5
= 5 + 5
= 10
Answer:
5. 8
6. 18
Step-by-step explanation:
5.
a(a^2 + a - 1) + 7 =
= a^3 + a^2 - a + 7
For a = -1,
= (-1)^3 + (-1)^2 - (-1) + 7
= -1 + 1 + 1 + 7
= 8
6.
2ab(a + b) - 3ab(a - b) =
= 2a^2b + 2ab^2 - 3a^2b + 3ab^2
= -a^2b + 5ab^2
For a = 1 and b = 2,
= -(1)^2(2) + 5(1)(2)^2
= -1(2) + 5(4)
= - 2 + 20
= 18
Answer:
Picture?
Step-by-step explanation:
