Explain how you would estimate to subtract 189 from 643

Given a circle with a radius of 0.85 meters, find the area of 1/3 of the circle. Use 3.14 for pi and round to the nearest hundredth.

What is the perimeter of the triangle if s=3 feet? Round your answer to the nearest hundredth

How do you work out? 12 : 12 : 4 * 3^2

Which expression is equivalent to 5x - 30

The sundae bar at Sarah's favorite restaurant has 5 toppings. In how many ways can Sarah top her sundae if she is restricted to at most 2 toppings?

Why does an even number plus an odd number always equals an odd number?

Alex collects stamps. He wants to buy a superhero set for $3.88, a president set for $5.88, and a dinosaur set for $3.88. He has $15 to spend on stamps.

When changing a percent to the equivalent decimal you drop the percent sign and then

Finish solving the system of equations - 9.5x - 2.5y = - 4.3 and 7x + 2.5y = 0.8 using the linear combination method. 1. Determine which variable will be eliminated: y will be eliminated because - 2.5y and 2.5y are opposite terms. 2.

An event lasts for 5 hours and 30 min how long did the event last in seconds