Math homework plz help

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.

Determine if the equation defines y as a function of x: 2xy = 1. yes o no