Simplify: ( y^−7 × y^−3 )−1 a. y−21 b. y 21 c. y−10 d. y 10

What other information do you need to prove triangle dac=bca by asa

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

The measure of an angle is 117°. what is the measure of a supplementary angle?