Y is directly proportional to X

When y = 30, x = 6

a) work out an equation connecting y and x.

b) Work out the value of y when x = 12

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.