1. 1 3/4 + 1/2 + 1/4 + 1/2 2. 5 5/8 - 2 6/7 - 2/7 -5/8
3. 9 5/6 + 1 1/4 + ___ = 14
Please answer these and help me!!!

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?