Find the value of x in the system, using substitution

y=2x; 4x-y=-4

The ratio of girls to boys in Liza's classroom is 5 to 4 How many girls are in her classroom if there is a total of 27 students? 1. 12 2. 9 3. 54 4. 15

Four more than a number and a no more than twelve

How do you solve 5 4/9 / 2 4/7?

What is the radius of a circle with an area of 32.1 square feet

Find the least common multiple of 7 3 2

A printer takes 5mins to print 90 copies of a repor. At this rate, how many copies of the same report can it print in 1/2 hours

What are the coordinates of the vertex of the graph of the function y=-x^2+6x-11 the options are: (3,-2) (3,16) (-3,-29) (-3,-20)

The annual amount A (in billions of dollars) Americans spent on meals and beverages purchased for the home for the years since 2000 can be modeled by A (C) - 286 + 880 where t represents the year, with t = 3 corresponding to 2003.

Carol is sixty-six inches tall. This is twenty inches less than two times Mindy's height. How tall in Mindy?

Assume running consumes 108 calories per mile. If you run 11 - minute mile what is your average power output, in watts, during a 2-hour run?