The ratio 8:12 is equivalent to y:9. what is the value of y?​

Choose all answers that apply: a) ab and a’b’ are one the same line. b) quadrilaterals abcd and a’ b’ c’ d’ have the same perimeters. c) points a and a’ have the same coordinates. d) none of the above

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap