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Answer:
8
Step-by-step explanation:
Step 1: Set up equation
-1 = 7 - x
Step 2: Subtract 7 on both sides
-8 = -x
Step 3: Divide both sides by -1
x = 8
So 7 subtracted by 8 equals -1.
We set up an equation for this. P = 2L + 2W.24 = 2(3W-8) + 2W
24 = 6W + 2W -16
32 = 8W
W = 4.
L = 3W-8
L = 3 (4) -8
L = 12-8
L = 4
Answer:
Step-by-step explanation:
I'll do this with synthetic division. It is the easiest to show in this editor.
8 || 1 + 0 + 0 - 158
8 64 + 512
============================
1 8 64 354
The results of the synthetic division are
x^2 + 8x + 64 remainder 358 / (x - 8)
You need to draw the triangle DEF with a right angle at E. Angle D = 40 and DE = 100 m. Once you have marked up your triangle, you can use cosine to find DF.