-NEED AN ANSWER FAST- Estelle got a new piggy bank and put in the same amount of money each week for 18 weeks. She spent $56.75 dollars on an anniversary present for her parents. At the end of the 18 weeks, she had $406.75 in her piggy bank. How much money did Estelle save each week? Estelle saved ___ dollars each week.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

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Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms