Explain how to find 40 x 50 using mental math

The Food Co-op Club boasts that it has 5,000 members and a 200% increase in sales. Their markup is 36% based on cost. What would be its percent markup if selling price were the base?

What is the y intercept in 7x+y=3

What is the greatest common factor of 8 and 13

84-63i in conjugate form?.

Evaluate the following expression if a = - 6, b = 2/3 and c = - 5.5 : - ab - ac

Solve the equation. -10.1=w+5.3 what does w equal

Solve by elimination method : x - y = 2, x + y = 12.

What is the square root of 9764

9 more than one-fourteenth of some number, W can be expressed algebraically as

Find the sum of 3 2/5 + 1 4/5