Identify one pair of supplementary angles(two angles that add ups to 180 degrees.)

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

20 points plus brainliest andwer plus my hover hoard im v desperate ! evaluate the polynomial for x=-2 in the equation -3x^3+7x^2-7x-1 (simplify your answer)

What is (2.5a^8n)^3 · (0.4^7n)^3 can you plz simplify this quickly offering lots of points