What does r equal in this problem 0.3r = 2.1

A boy purchased a party-length sandwich 53 in. long. He wants to cut it into three pieces so that the middle piece is 6 in. longer than the shortest piece and the shortest piece is 8 in. shorter than the longest piece.

How do I find the slope of a graph?

Factor the trinomial x^2-14+45

What is the two smallest number? 0.205; 0.01; 0.02

Each car on a commuter train can seat 114 passengers. If the train has 7 cars, how many passengers can the train seat

33 is 90% of what number

Using the first digit 3331 / 47 how do you get the answer without dividing.

Given the sets a={0,1,2,3,} b={a, b, c, d} c={0, a, 2, b}. Find B u c

Solve for x. Round to the nearest tenth 3.7

Explain how you know a system of equations has exactly one solution no solution infinitely many solutions