The best answer is C : The sum of the measures of two angles os 180 degrees .
Lets call x how wide it is, and write the area equation:
area = width*length
a = (x)(x + 5) = 20000
expand it:
x^2 + 5x = 20000
make a quadratic trinomial:
x^2 + <span>5x - 20000 = 0
</span>lets apply the general quadratic formula to solve:
x = (-5 +- √(25 + 80000))/2
x = (-5 +- 282.89<span>)/2
we take the positive solution:
</span>x = (-5 + 282.89<span>)/2
</span>x = 138.94
therefore the rectangle width is 138.94 m and <span>143.94 m long</span>
Multiply top equation by -2, then add equations so b drops out....solve for a...plug in a to get b
Answer:
the picture is kinda blur but nvm
Step-by-step explanation:
3:b
4:b
5:a
6:b
Answer:
12x-39
Step-by-step explanation:
-7+4(3x-8)=-7+12x-32=12x-7-32=12x-39