sally and Martha had the same number of postcards after Sally sold 18 of her postcards Martha had four times as many postcards as Sally how many postcards did each girl have to begin with

Fiona made a score of 76 on her midterm exam for her to get a b in the course the average of her midterm exam and final exam must be between 80 and 89 inclusive what possible scores on the final exam would give Fiona a b in the course?

Solve this equation: 3x-1/5-2/9x=124/5 Step 1: Simplify by combining like terms. Which terms can be combined? A) 3x and - 1/5 B) - 1/5 and - 2/9x C) 3x and - 2/9x

Find the annual simple interest rate if: I=$60, P=$500, and t=3 years.

For what value of x, the triangle having the sides x, x+7, x+8 is a right angled triangle

Just a simple linear equation: 7 - 3x = 13 + 2x

Can√ (a²+b²) be written as √ (a+b) ?

Express the product of 2x2 + 6x - 8 and x + 3 in standard form.

Trent wants to buy 2 packs of trading cards for 3 dollars each. The tradings cards

Simplify. 4n + 12 + 7n

What is the minimum value of f (x) = x2 - 10x + 19? -10 -6 19 5