Please help me with this question!!

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

M∠abc=138° and m∠def=31° . which statement is true about ∠abc and ∠def ? a: the angles are neither complementary nor supplementary. b: the angles are complementary. c: the angles are supplementary.