16) a business executive bought 40 stamps for $9.60. the purchase includes 25 cents and 20 cents stamps. how many f each type of stamp were bought?

How many grams must be adde to 970g to make 1 and a half kg

Simplify the expression 10/11(22z) + (a+5) -1

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income