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1.1 × 10 to the power of 5 + 4 × 10 to the power of 8 = (answer) × 10 (answer)

7x+8y=-18, 4x-9y=-3 solve the system of equations

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?