Marks brother is five years older than mark. their combines ages add up to 23. how old is mark?

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.

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)