Which equation shows y = -1/2x + 4 is in standard form. A. x + 2y = 8
B. 2x - y = 8
C. x + 2y = -8
D. 2x + y = 8

Answer this question! 30 points and brainliest! only if you know the answer.

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.