Answer:
x=10
x=30
x=15.3
x=4
Step-by-step explanation:
1/2x+7=27
2x+7=27
2x=20
x=10
5=1x-25
30=1x
30=x
3x+9=54
3x=46
x=15.3
16=5x-4
20=5x
4=x
Answer:
The dimensions of the new rectangle are
by 
Step-by-step explanation:
we know that
The dimensions of the new rectangle will be equal to the dimensions of the original rectangle multiplied by the scale factor
In this problem we have that
the scale factor is equal to 
so
Find the new length L2

Find the new width W2

(r -1 -2r) <= -2. Simplify.
r -2r <= -2 +1.
-r <= -1. Divide both sides by -1 and reverse the sign. Recall in inequality
when you multiply or divide by negative, the inequality sign is
reversed.
r >= -1/-1
r >= 1.
That's it.