write an equation that represents the following sentence? the sum of a number and two is twice the number.
1 answer:
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Answer:
Step-by-step explanation:
We have two triangles and three rectangles.
The formula of an area of a triangle:
b - base
h - height
The formula of an area of a rectangle:
l - length
w - width
TRIANGLE:
b = 11 in, h = 7 in
RECTANGLE 1:
l = 11 in, w = 14 in
RECTANGLE 2:
l = 9 in, w = 14 in
RECTANGLE 3:
l = 8 in, w = 14 in
The Surface Area:
Substitute:
You can determine this by finding zeros of quadratic function,
.
Which eliminates first and third option.
Now we have up and down parabolas left.
If we factor we find that the coefficient before
determines how it is turned, since its positive its an upward turned parabola hence the answer is the last graph.
Hope this helps.