Jennifer was going to sell all of her stamp collection to buy a video game. After selling half of them she changed her mind. She then bought fifteen more. How many did she start with if she now has 43?

Round 713,949 to the nearest hundred

Simplify the expressions. i^23

After Ronaldo Fourth of July party 2/3 of his cake is left. How much cake will be left if his cousin Max eats another 1/6? Simplify if possible

512 ounces is how many quarts

Which of the equations, in its simplest form, will be equivalent to 3x + 2 + (-5) a. 2 + 3x + 5 b. x - 1 + x - 2 + x c. - 3 - 3x - 1 + x d. 3 - 3x

F (x) = 2/x at x = - 2

Write each number in expanded form 670,200,640

A box is tossed upward from a cliff that is 15 meters high, at a speed of 4 meters per second. The height of the box is given in meters by h (t) = -4.9t^2+4t+15 where t is seconds. What is the height of the box at 1 second?

Paulo's father bought 8 pizzas and 12 bottles of juice for the class party. Each pizza coast $9 and each bottle of juice cost$2 Paulo's father paid $100-bill. How much change did he get back

Two numbers are in the ratio 7:8. Find the numbers if their sum is 45.