Four subtracted from the reciprocal of a number

The relative frequency of getting a head when tossing a coin is 3/8 how many heads would you expect if the coin is tossed 400 times

3/5 + - 1/5 : 1/4 : - 1/3

Slope is 3 and (1,4) is on the line

The produck of a number and 4 is at least - 12.

How many drops of water are in all the oceans on earth? Assume that 1cm3 contains 25 drops of water. Remember that this is an order-of-magnitude problem, so you should expect that you will only find rough estimates for the numbers you require.

The sum of x and 9 is divided by 2. That quantity is equal to 3x

Joe has a spinner with labeled 1, 1, 2, 2, 4. If he spins 20 times, how many will be 2?

How do i find the zero of (x-10) (4x-3) = 0

A rectangle has a height of 5x and a width of x + 2, express the area of the rectangle.

Richard buys, fixes, resells small devices, like the Mir487, which consistently needs a transistor replaced. He can buy the transistor for $8.10 and a broken Mir487 for $51.90. Once fixed, he resells the new Mir487 for $224.96.