Let R be the relation on N x N defined by (a, b) R (c, d) if and only if ad bc. Show that R Equivalence Relations. is an equivalence relation on N x N.

Brine is a solution of salt and water. If a tub contains 50 pounds of 5% solution of brine, how much water (to the nearest tenth lb.) must evaporate to change it to an 8% solution?

What is 199 times 199

The table shows a company's profit based on the number of pounds of food produced. Using the quadratic regression model, which is the best estimate of the profit when 350 pounds of food are produced? $5,150 $5,300 $10,150 $11,000

Solve for x 3/4 x + 5/8 = 4x

Assume body weight and height are related by the formula W=2H+13, where W represents weight in pounds and H represents height in inches. What is the weight in pounds of a person whose height is 5 feet 6 inches?

If s (x) = 2 - x2 and t (x) = 3x, which value is equivalent to (s. t) (-7)

Kevin and his sister, katy, are trying to solve the system of equations. Keven thinks the new equation should be 3 (6x-1) + 2y=43, while katy thinks it should be 3x+2 (6x-1) = 43. Who is correct and why

If 4x=32 find the value of 35-5x

On Saturday, a local hamburger shop sold a combined total of 520 hamburgers and cheeseburgers. The number of cheeseburgers sold was three times the number of hamburgers sold. How many hamburgers were sold on Saturday

Find the area of the circle with a circumstance of 6.28 units