For which of the following decreasing functions f does (f^(−1))′(10) = −1/8 ? A
f(x) = −5x + 15

B
f(x) = −2x^3 − 2x + 14

C
f(x) = −x^5 − 4x + 15

D
f(x) = e^(−2x) − x + 9

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.