The front of an A-frame cottage has the shape of an isosceles triangle. It stands 19 feet high and is 20 feet wide at its base. What is the angle of elevation of its roof?

d. is the correct answer

step-by-step explanation:

the answer is 8.64

step-by-step explanation:

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

a 90 degree rotation across the the origin followed by a reflection across the x-axis.

step-by-step explanation: