Answer:
h = 24 cm
Step-by-step explanation:
The formula for area of a triangle is
A = (1/2)bh where b is the base and h is the height.
We are told that the base is 5 times the height, this translates to
b = 5h, so we can rewrite our formula to
A = (1/2)(5h)(h) or
A = (1/2)5h²
We are given A = 1,440, so plug that in and solve for h...
1,440 = (1/2)5h²
2,880 = 5h² (multiply both sides by 2 to get rid of the fraction)
576 = h² (divide both sides by 5 to get the h value by itself)
24 = h (take the square root of both sides)
Answer:
39
Step-by-step explanation:
Answer:
2x(x-4)
Step-by-step explanation:
2
-8x= 2(-4x)= 2x(x-4)
a) 8 -5v-3 = 5v-5
-5v+5 = 5v-5
identity
b) 3m-6 =4m+7
has 1 solution
c) 2w +4 = 5w -2w +4
2w+4 = 3w+4
w=0
one solution
d) 7y+9 = 7y-6
subtract 7y from each side
9=-6 impossible
no solution
Choice D
