Which of the following would not be the result of a substitution in the following system?
2x + y = 7
y - x= 1

A. 7 - 2x - x= 1
B. 2x + x + 1 = 7
C. 2(y + 1) + y = 7

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

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.

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?