20x+5y=40 solve for x

In a herd of cattle, the ratio of the number of bulls to cows is 1:6. Find the number of bulls in terms of x.

At the beginning of Jack's diet he was 275 pounds. If he lost 3 pounds per week, find his weight after 12 weeks.

The population of a small town in northern California gradually increases by about 50 people a year. In 2010, the population was 8500 people. Write an equation for the population of this city and find its estimated population in 2017.

Does a sock has 1 line of symmetry

What is the ordered pair of -x+4y=7

If 80% of scheduled flights actually take place and cancellations are independent events, what is the probability that 3 separate flights will take place?

What is another way to express 64? A) 3 ^4 B) 6 ^4 C) 6.4 x 10^2 D) 8^2

Which values, when placed in the box, would result in a system of equations with no solution? Check all that apply. y = - 2x + 4 6x + 3y = A: - 12 B: - 4 C: 0 D: 4 E: 12

During a trip, Francine traveled x percent of the total distance at an average speed of 40 miles per hour and the rest of the distance at an average speed of 60 miles per hour. In terms of x, what was Francine's average speed for the entire trip? A.

You are planning a huge graduation party for your son. You decide to offer both a beef and a chicken meal at the party. The chicken dish costs $5, and the beef dish costs $7.