A person has 20 coins, all nickels and dimes, worth one dollar and 40 cents. How many nickels are there?

If n = number of nickels and d = number of dimes, which system of equations represents the problem?

An integer is 1 less than twice that of another. If their sum is 20, find the integers

125% of what number is 65

What are the four requirements of a linear programming problem? A. alternatives, states of nature, conditional values, and probabilities B. an objective, constraints, alternatives, and conditional values C.

If x amount of coins are tossed, find the probability that they'll all come up tails.

Laura paddles in her canoe at a speed of 5 mph for 5 miles. she then hops on her windsurfer and sails for 6 miles at a speed of 6 mph. for how long does laura travel?

A planes trajectary from toronto to montreal is represented by this equation h=-2.5t^2+200 h = hieght of flight and t = time of flight. How long would the flight from toronto to montreal last?

A small refrigerator is a cube with a side length of 14 inches. Use the formula S = 6s2 to find the surface area of the cube.

Tom got 38 Valentine's mike got 42 Steve got 51 and Charles got 29 what was the average number of Valentine's each one got?

Nathan Perez earned $220 in simple interest in 9 months. What is his account's annual interest rate if he deposited $4,000?

Is 0.7 equal to less than or greater than 7/9