In a school, the ratio of the number of pupils to the number of teachers is 20:1. If the number of pupils is 840, how many teachers are there?

If you estimate 342*7 by using 350*7, is 50 greater than or less than the exact answer?

The career clusters were created by: A. State government B. Local chambers of commerce C. The federal department of commerce D. The federal department of labor

Ticketd to the school play cost $11 for adults and $6 for children. What expression can be used to find the toyal cost for x adult tickets and y children tickets? (11+6) + (x+y) 11x+6y) (X+11) * (y+6) 6x+11y

The speeds in miles per hour of seven randomly selected qualifiers for the Indianapolis 500 (in 2012) are listed below. Estimate the mean qualifying speed with 95confidence. Round your answers to four decimal places. 223.684 222.929 226.240 224.

How do you find factor

Which system of equations has exactly one solution? - 2x-4y = 8 x+y=7 3x+y=-1 x-2y = -2 3x+3y=3 -Ex-by=3 3x-2y=4 -3x+2y=4

The side length of a square is shown. Which expressions are equal to the perimeter of the square? (w-2) Select all that are correct. 2 (w - 2) + 2 (w - 2) w + w + w + w - 2 - 2 - 2 - 2 4w - 2 2w - 4 4 (w - 2)

115 and 125 as a decimal

There is a spinner with 14 equal areas, numbered 1 through 14 if the spinner is spun one time what is the possibility that the result is a multiple of 6 or a multiple of 4

Which expression is equivalent to (73) - 2?