based on the drawing both sides are the same length
so knowing BC = 23 you need to find the value of x and put it in the formula for the side
23=2x+7
16 = 2x
x=8
4x+1 = 4(8)+1 = 33 units
Answer:
A = P * a / 2
A = 81.25
Step-by-step explanation:
We have that there is a corresponding formula for a regular decagon, which depends on the apothem and the perimeter, it is the following:
A = P * a / 2
In this case, the perimeter is the sum of all the sides, that is, 10 sides, therefore:
P = 10 * 3.25
P = 32.5 meters
We replace:
A = 32.5 * 5/2
A = 81.25
Which means that for that regular decagon, the area is 81.25 square meters.
Hope this helps!
1. 6
2. 64
1.3x10^-2 = .013
.013 x .05 = .00065
.00065 = 6.5x10^-4
Let's make the length L and the width w. So, here's what we know:
L = 2w + 10
Lw = 1500
Substitute L in as 2w + 10:
w(2w + 10) = 1500.
Simplify.
2w squared +10w = 1500
Make it a quadratic equation, w = 25 or -30. Since it can't be negative, w = 25.
1500/25 = 60.
Length = 60
Width = 25
