Which ordered pair is a solution to the system of linear equations y= 5x+8 and y= -4x-1 (1,3) (3,-1) (-1,3) (-3,1)

Does anyone know how to do geometryme with this problem

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

The area of square garden is 300m squared. how long is the diagonal?