Explain how you could use a number line to show that -4 + 3 and 3 + (-4) have the same value. which property of addition states that these sums are equivalent?

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?