What is the solution of the linear system of equations?

a.
(1, 1)

b.
(-1, -1)

c.
(-2, 3)

d.
no solution

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

Bring the fraction a/a-4 to a denominator of 16-a^2

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank