<span><span>L
* W = 300 sq ft
</span><span>
Length is 10 ft greater than twice the width.
L = 2W + 10
Substituting
(2W+10)*W = 300
2W^2 + 10W = 300
Divide both sides by 2
W^2 + 5W = 150
W^2 + 5W - 150 = 0
Factor
(W +15)(W -10) = 0</span></span>
<span>
<span>
Roots are W=-15 and W=10.
A negative width is impossible, so W=10
L = 2W + 10
L = 2(10) + 10
L = 30</span></span>
length = 30 feet, width = 10 feet
<span> Check:
30*10 = 300</span>
Answer: D. (8, 4)
Step-by-step explanation:
On the right hand side it should be m(x-x1)
Y-4=-3(x-5)
Y=-3x+19
-4 first we rearrange the question x-2y=8
x-2y=8
-2y=-x+8
y=1/2x-4 (divide by -2 everywhere)
-4 is the y intercept.
