Suppose that r varies directly with s and inversely with t, and r=2 when s=3 and t=12. What is the value of r when s=5 and t=4?

I already know the answer but I'd like to know how to find it.

How many times greater is the value of the 4 in 42,672 than the value of the 4 in 37,426? A. 100 B. 10,000 C. 1,000 D. 10

Solve 3x - 6y = - 1 for y

In a store 60 cans of soup are arranged to be displayed in 10 equal rows. why does the fraction 10/60 not represent this solution

Evaluate (c - b) 2 + a2 for a = - 5, b = - 2, and c = - 4.

How do I find two integers whose sum is - 6

Nadia bought 5 tickets to attend a spaghetti supper fundraiser at her school. The equation 5x = 32.50 can be used to find x, the cost of each ticket in dollars. Which equation represent the cost of each ticket.

Evaluate 3+jk+k^33+jk+k 3 3, plus, j, k, plus, k, cubed when j=2j=2j, equals, 2 and k=6k=6k, equals, 6

Use the Pythagorean Theorem to find the missing side. Round your answer to the nearest hundredth. 19 m 52 m

A machine produces a total of 12,000 bolts a day, which are on the average 3% defective. Find the probability that out of 600 bolts chosen at random, 12 will be defective.

Determine the slope of the line that has the following coordinates: (-3,6) (4,-2) -7/8 12/7 -8/7 8/7