John started homework at 7:00 pm he finish at 3:00 then he checked double the amount last time how much time did he spend

Write your answer using positive exponents only. (-2x^2) ^4

Which proportion can be used to determine what number is 15% of 30? A. 15/30=x/100 B. 15/100 = x/30 C. 15/100 = x/30 D. 30/100=15/x Which equation can be used to determine what number, n, is 40% of 64? A. (40) (64) = n B. 40:64=n C. 0.40 (64) = n D.

Jason manually calculated the present value of $500,000 at 4 percent 20 years from now to be $226,445.21 when interest is compounded semiannually.

A diagram has circles which represent the populations of various countries in the world. The circle for India has a radius of 3.2 cm and the circle for China has a radius of 3.4 cm.

Identify the kinds of sample that is described. A researcher randomly selects 5 local fast food restaurants and the ask all school age children at those restaurants their on the new town curfew?

What number is 70% of 65?

Divide £56 in a ratio of 4:3

Which is larger 117.93 or 117.859

What equals - 18 - (-5) = ?

Simplify (2x^{2} - 5x + 3) - (-x^{2} + 4x - 5)