Multiplying a number by 4/5 then dividing by 2/5 is the same as multiplying what number?

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.

This circle is centered at the origin, and the length of its radius is 6. what is the circle's equation? a. x^2+y^2=36 b x^2+y^2=6 c x+y=36 d x^6+y^6=1