The speed of a sound wave in air depends on the air temperature. The formula

a=1052+1.08t

What is the sum of these mixed numbers 2 1/8 + 4 3/8

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )