2998 feet of glass was needed to cover the pyramid. You add 646 plus 350 and multiply by 3, which is the side length of the pyramid. (Pyramids or triangles have 3 sides.)
Answer:
46
Step-by-step explanation:
x +3x+5x - 54 = 360
x +3x+5x = 360 + 54
9x = 414
x= 46
Step-by-step explanation:
If you lost "y" in the first equation.

If first equation is correct.

Answer:
1. f(4) or f(n)= 28
2. f(-2) or f(n)= -2
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Step-by-step explanation:
n=4 n=-2
f(n)= 5(n)+8 f(n)= 5(n)+8
f(n)= 5(4)+8 f(n)= 5(-2)+8
(n)= 20+8 f(n)= -10+8
f(n)=28 f(n)=-2
Answer:

Step-by-step explanation:
since a=lw, the area is (x^2-3x+7)(x+4)
1. distribute parentheses 
2. apply +(-a)=-a rule 
3. Simplify
Steps to simplify:





4. Add like terms 
5. Add like terms 