Which expression simplifies to 5v3?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Is there an x intercept in the equation 60*1.15^x

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?