Sally has a photograph that has an area of 20 square inches. She creates two enlargements of the photograph. The enlargements have areas of 80 square inches and 320 square inches. In each photograph, the length is 1 1
4
times the width.

Select which of the following could be the dimensions of the original photograph or one of the enlargements. Select all that apply.

A 8 inches by 10 inches
B 16 inches by 20 inches
C 4 inches by 5 inches
D 5 inches by 16 inches
E 8 inches by 20 inches

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180