6r-r+8(15-r)+23-6 consider the expression is -3r+137 equivalent to the given expression. explained how you determined whether the expression is equal or not.

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

If you answer 2+2 you will get over 80 points

Charlie tosses five coins.what is the probability that all five coins will land tails up.