Which statement describes the relationship between the line graphs of the equations below? y = −2 x + 4 y = 1/2x + 4 a. The line
graphs are the same line. b. The line graphs are parallel lines. c. The line graphs are perpendicular lines. d. The line graphs intersect, but are not perpendicular.
1 answer:
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Answer: 15
<u>Step-by-step explanation:</u>
small: 5 12 13
middle: __ 36 39
large: 45 108 117
Notice that to get from the small to the large, multiplied by 9
5(9) = 45 12(9) = 108 13(9) = 117
That is because the sides are proportional
To get from small to middle, multiply by 3
5(3) = 15 12(3) = 36 13(3) = 39
To solve it using proportions:
Let be the unknown number. Its square is
. The product of 6 and the square of the number is
. Increase this by 5 and you get
.
If this has to equal 4, you have