2x + y = 7
y = x + 1
when the expression x+1 is substituted in for y in the first equation, the result is

x + 1 = 7
2x + 1 = 7
3x + 1 = 7

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.