What is the average of the first 99 counting numbers?

How do you solve this without having to add all the numbers and divide by 99?

Supposed you have a box containing 5 black marbles, 4 blue marbles and 2 red marbles. One marble is selected. Find the following probability

Two consecutive pdd integers have a sum of 84 what are the two integers

What is the slope of a line perpendicular to the line whose equation is y = 2x + 5? slope = - 1 Slope = - 1/2 slope = - 2

Miro practice shooting a basketball for 7and 10 of her total practice time during the other time she practice dribbling is she practice dribbling for 18 minute how many minutes did she practice shooting

Write these decimals in ascending order smallest to biggest ... 2.1, 2.01, 2.21, 2.12, 2.102

What is 6/4 as a decimal

What is the expression in factored form? 16x^2 - 25

When I multiply by 4, add 12, divide by 2, then square root, I get 10. What number did I start with?

Arrange these numbers from least to greatest 5/6, 7/9, 3/5. A. 5/6, 3/5, 7/9. B. 5/6, 7/9, 3/5. C. 3/5, 7/9, 5/6. D. 3/5, 5/6, 7/9

You work at a factory that bottles honey. The factory bottles 5,250 gallons of honey into cup size bottles on average a day. How many cups of honey does the factory bottle a day