Evaluate the expressions.

(a) 20 div 7

(b) 20 mod 7

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

The bottom of a vase is a square.each side measury y+11 units.the square has a perimeter of 55 units what is the value of y?