Please help me with this question. Thanks.

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Choose the correct translation for the following statement. it is at most ten. x< 10 x< 10 x> 10 x> 10