X+y=5 and x-3y=3 linear equation I don't get an answer that makes sense

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

Jade wants to visit her friends but wants to know if she can visit both of them without driving over 30km. Jade lives 11.4 km of east of her friend, Jessica. Her other friend, Olivia, lives 8.9km south of Jessica.

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