9. What is the angle of rotation for the following figure?
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HELPPP

The reflexive property of congruence lets you say that ∠pqr ≅

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?