If 4 over 7 of a ton of concrete covers 7 over 8 of a bridge, how many tons of concrete are required to cover the entire bridge? NEED ASAP

Find the solution of system of equation y= x-4 y=4x+2

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

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document