Consider the following pair of equations: y =x+4
y=-2x-2
explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Find the area of an equilateral triangle with a side of 6 inches