Which best explains why all equilateral triangles are similar?

A. All equilateral triangles can be mapped onto each other using dilations.

B. All equilateral triangles can be mapped onto each other using rigid transformations.

C. All equilateral triangles can be mapped onto each other using combinations of dilations and rigid transformations.

D. All equilateral triangles are congruent and therefore similar, with side lengths in a 1:1 ratio.

m∠a is 90°

m∠b is 40°

i think you would have to divide the money he had saved, which is $2,000 by the time he plans on exercising which is 40 hours, and the answer you get should tell you the answer to your question.

josh is incorrect

x= 7 and x= -1

step 2 is wrong and honestly first step is not needed, you just need to figure out the factors

i know its wrong because if you plug in the solutions josh found, they do not work (in the original equation)

x^2 -6x -7 = 0

(x-7) (x+1) = 0

x-7=0 x+1=0

x= 7 x= -1