What is the result of adding these two equations?

-5x - 9y = 3

5x - 9y = - 2

What is the value of arc x if the central angle is 140°? 140

Last month, Maria purchased a new cell phone for $500. The store manager told her that her new cell phone would depreciate by 70% every 6 months. Maria thinks she will want to replace her phone after a while.

Suppose a city has 810 high-rise buildings, and 29 of these buildings have rooftop gardens. Find the percentage of high-rise buildings with rooftop gardens in this city. Round your answer to the nearest tenth of a percent.

Fraction form what is 9/10 divided by 4/10

What are the lengths of the legs of a right triangle in which one acute angle measures 19° and the hypotenuse is 15 units long?

Find the vertex of the graph of the equation x - y^2 + 6y = 8. Halp me

The product of a number and 4 is 69. What is the number?

A contractor has at most $42 to spend on nails for a project. Finishing nails cost $0.45 per pound and common nails cost $0.60 per pound. He would like to purchase at least 30 pounds of nails total. a. Write a system of linear inequalities: b.

Given the function g (x) = 6 (4) x, Section A is from x = 0 to x = 1 and Section B is from x = 2 to x = 3. Part A: Find the average rate of change of each section.

What is 10 more than 12,399?