Answer:
a
Step-by-step explanation:
because 8-2 is 6. and 8 times 5 is 30.
10x^2-10x+20 is the answer to this
5X+3X=80
8X=80
X=10
5×10=50
3×10=30
50 and 30
The equation that can be used to determine the dimensions of the base of the doghouse is x² + 4x = 21
<h3>
What is the equation?</h3>
A quadratic equation is an equation that usually has a single variable and it is raised to the power of 2.
Area of a rectangle = length x width
x (4 + x) = 21
x² + 4x = 21
To learn more about quadratic equations , please check: brainly.com/question/27696091
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