31.75÷8=? rounded and what would you get if you ÷ the? by 8

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

Evaluate the expression for the given value of the variable. ∣-4b-8∣+∣-1-b^2 ∣+2b^3 ; b=-2

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.