Answer:
AC=7
Step-by-step explanation:
x+5=3x+3
-4x=-2
x=2
Substitute x in.
2+5=7
Hope I helped! Sorry if incorrect.
~Mschmindy
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Answer:
(x + 5) (x^2 -3)
Step-by-step explanation:
Do the grouping:
Then factor out 
in the first and −3 in the second group.
Factor out the common term x + 5 by using the distributive property.
Polynomial 
is not factored in since it does not have any rational roots, thus getting the following:
Answer:
(x+6) (x-3)
Step-by-step explanation:
Set the difference first.
_x_= -18
_+_ = 3
6 x -3 = -18
6+(-3)= 3
Now distribute it with the x^2
(x+6) (x-3)
Tada!
Answer:
19.1
Step-by-step explanation:
27 is half of 54, so that means that the second triangle is 1/2 the size of the first, meaning all sides need to be divided by 2 in order to get the answers for each side
