If the cost of 10 pens is rupees 144.40, then find the cost of 7 pens

What is the standard form for y + 5 = 0?

Use the substitution method to solve the system of equations. Choose the correct ordered pair. у = 8 х - 4 х = 4 A. (2, 4) в. (2, 12) с. (4, 28) d. (4, 4)

Mr. Cole purchased oranges at a farmer's market. He paid $5.76 for 3.2 pounds of oranges. How much did Mr. Cole pay for each pound of oranges?

The store buys a keyboard for $35 and sells it for $61.25. What percentage was the markup?

Kayla is 13 years old. Her uncle says that his age minus 22 is equal to Kayla's age. How old is Kayla's uncle?

There is a number, which has five digits 5abc9. If this number is the square of an integer, where a, b, c each represent a missing digit and all five digits are different, then find this number.

Andy's backpack weighs 2 1⁄4 pounds. If he removes a book that weighs 13 ounces, how much does the backpack now weigh?

Amy can run 1/10 mile per minute. How many minutes will it twke Amy to run 3 miles?

A company manufactures and sells x monitors each hour. The hourly price and cost equations are: p=500-0.8x C (x) = 4x+6000 a. Given that R (x) = xp, find the revenue function, R (x)

What is y = - 3/4x-4/7