Donna had $9 in her bank account. She made $16 when she mowed her neighbors' lawns. Then, she spent $27 at the movies. How much is left in Donna's bank account?
$-2
$-20
$16
$52

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?