Straight-line graphs: "James plots the points A (5,7), B (1,-1), C (13,4) and D (3,-2). He claims he can draw a line perpendicular to AB that passes through the midpoint of both AB and CD.
Is he correct? Explain your answer."
I know this is correct but need help on how to explain, please!

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

F(x)=5/6x+3 which of the following is true

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?