Answer:
B
Step-by-step explanation:
-2(x - 5) + 4(9 + x)
-2x + 10 + 36 + 4x
=2x + 46
We can represent the base as z and the height as 2z+6. We are going to use the formula A=1/2*b*h and solve for z
180=1/2*z*(2z+6)
360=2z^2+6z
0=2z^2+6z-360
0=2(z^2+3z-180)
0=(z+15)(z-12)
So z=-15 and 12 but it must be positive so then the base is equal to 12
When we plug this into 2z+6 we get 30 for the height
2(12)+6=30
Hope this helps
Answer:
Step-by-step explanation:
To evaluate , substitute to so we should have:
Evaluate the expression and finally, we have:
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