A city has 3 new houses for every 9 old houses. If there are 21 new houses in the city, how many old houses are there?

The square of a number, n, is equal to the sum of that number and 5. Which equation represents this relationship? A. 2n = n + 5 B. n2 = n + 5 C. 2n = n - 5 D. (n + 5) 2 = n + 5

How many drops of water are in all the oceans on earth? Assume that 1cm3 contains 25 drops of water. Remember that this is an order-of-magnitude problem, so you should expect that you will only find rough estimates for the numbers you require.

Give the standard form of a circle with a radius of 4and a center of (1,4)

Write an expression for the perimeter of the rectangle given 3x+4 and 2x-3

Circle an expression and the variable you would substitute if for in each system y=2x x+3y=14

To find the surface area of the figure shown Mia found the surface area and the rectangular prism and the rectangular prism from this Mia subtracted 6ft did mia make an error

Describe the graph of the function f (x) = x3 - 18x2 + 107x - 210. Include the y-intercept, x-intercepts, and the shape of the graph.

200 is blank times ad much as 2

How do I graph 2x + 3y = 7

The mathematics department of a college has 14 male professors, 15 female professors, 12 male teaching assistants, and 11 female teaching assistants.