How do I find the answer for this equation 20x+15y = 330, when x+y = 18

A=18cm2 thats in the in side of the rectangle. the out side says 6cm and it says what is the base

Ann is grouping 38 rocks se can put them into Groupon of 10 rocks or as single rocks. What are the difierent ways Ann can Groupon the rocks

What is the slope of any line perpendicular to the line 2x + 3y = 5?

Square root of 17 32 60 125

Solve for x: 4^x=0.25

Jorge is baking cookies. The recipe makes 144 cookies. If Jorge and his 5 friends want to divide the cookies evenly, how many cookies will each person get?

For the schools sports day a group of students prepared 21 1/2 lbs of lemonade at the end of the day they had 2 5/8 lbs left over how many lbs of lemonade were sold

The area of a rectangle is 48 square centimeters. The length of the rectangle is 8 centimeters longer than the width. Which equation models this situation? A. 8w=48 B. w+8w=48 C. w+8=48 D. w (w+3) = 48

Tanya drove 312 hours and used 13 tank of gas. For how long could Tanya drive using 12 tank of gas? In simplest form.

What are you finding when you take the derivative of a function?