Hehe!! I need help w/ this. Can someone do this whole thing for brainliest?

Your company withheld $4,463 from your paycheck for taxes. you received a $713 tax refund. select the best answer round to the nearest 100 to estimate how much you paid in taxes.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

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?