Use the commutative property to create equivalent expressions. Which expressions are equivalent to 2.2t + 3.5 + 9.8? Check all that apply. 3.5 + 2.2t + 9.8
3 + 2t + 9
2.2 + 3.5 + 9.8t
9.8 + 3.5 + 2.2t
2.2t + 9.8 + 3.5
2.2t + 35.98

CAN SOMEONE PLEASE HELP ME!!!

IM GIVING 50 POINTS FOR THIS PLEASE!!!

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Find two numbers if their sum is 91 and the ratio is 6: 7?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?