The “≡ mod 3” relation is an equivalence relation on the set {1, 2, 3, 4, 5, 6, 7}. list the equivalence classes. explain in detail how you got each of the equivalence classes.

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

What is the radius of the cone in the diagram? round your answer to the nearest whole number

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%