When adding or subtracting fractions with like denominators , does the denominator change ?

John makes $10.50 pers hour what expression represens how much he will make if he works h hours

The system of equations graphed below has how many solutions? y = 2x + 2

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition