Alan averages 10 hits out of 25 shots at the target. What is the chance that he will hit his next two attempts?

There are eight more girls than boys in a school play. The ratio of boys to girls is 5 to 7. how many boys and girls are the play?

16 is 25% of what number

4 (x2-5x+3) - 2 (x2-4x+2

Find the 50th term of the following arithmetic sequence: 6, 15, 24, 33, ...

The digits of a certain three-digit number are consecutive odd numbers. If the sum of the digits is 15, find the number.

12 less than 7 times a number x

What is 5 times 10 plus 5 times 4 equals

Here are six measurements of the electrical conductivity of an iron rod. 10.06 9.87 10.03 10.14 10.19 10.09 The iron rod is supposed to have conductivity 10.1. Do the measurements give good evidence that the true conductivity is not 10.

Substitution -2x-y=-9 5x-2y=18

Suppose you want to know the opinions and ideas of a very large population. Explain how you would gather a sample so that it is representative of the larger population.