Consider the system of equations. 5x + 2y = 12

5x – 2y = 28

What is the solution to the system of equations?

A.
(5, -6.5)

B.
(4, 16)

C.
(4, -4)

D.
(-4, 4)

Anyone know? will mark brainliest if correct!

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?