20x+5y=-15 solve for y

27x+3=6 Whats is x in that problem

You are preparing to tile the floor of a rectangular room that is 15.5 feet by 18 feet in size. The tiles you plan to use are squares, measure 12 inches on each side, and are sold in boxes that contain enough tiles to cover 25 square feet.

Paula os counting by 9s. Peter is counying by 4s. they pace the counting so that they will say the first common number together. What is the first number they both will say?

Use the formula for computing future value using compound interest to determine the value of an account at the end of 7 years if a principal amount of $2,500 is deposited in an account at an annual interest rate of 4% and the interest is compounded

David knew he made a mistake when he calculated that Gilda walks 123 miles to the station. Read through David's calculations: Using d = rt, the distance is the same, but the rate and time are different.

Every day, Bert spends an hour commuting to and from his office, driving at an average speed of 50 mph and taking the same route each way. How far does Bert live from his office?

Write this number in standard form. 7 millions, 14 hundred thousands, 8hundred, 2 ones

One morning in Helena, Montana the temperature was 12 degrees Fahrenheit ( f. below zero. By noon the temperature had risen 25° f. Which expression can be used to find the temperature, in degrees F, at noon that day in Helena, Montana?

How many fluid ounces are in 3620.8 cm squared?

If the angles of a triangle are represented by x, 3x+20, and 6x. then what type of triangle is it?