if a sample of 57 swimmers is taken from a population of 135 swimmers, the population mean is the mean of how many swimmers' times?

How do you solve 3x-3=4x+1

66 is 11% of what number?

50,000 is blank times as much as 500?! I don't get it!

For how many values of x: (4.9 cm < x < infinity) is it true that ex = 0?

A man who was 6 feet tall was standing next to a tree. the man cast a shadow that was 27 feet long while the tree cast a shadow that was 81 feet long. how tall is the tree?

What does |-|-40 equal to?

M∠GHI=98° and m∠JKL=82°. Which statement is true about ∠GHI and ∠JHK ? The angles are supplementary. The angles are neither complementary nor supplementary. The angles are complementary.

Write the equation of a line passing through (5,2) parallel to y=4x-3

Work out the area of a parellogram of base 7cm and height 3cm

Evaluate the expression if a = 4, b = 7, and c = 9. what does ac + b =