If 20% of a number is 15 what is the original number

Which tens is 42 between?

What is the 50th term of the sequence that begins - 4, 2, 8, 14?

Write the expression as the sine, cosine, or tangent of an angle. sin 9x cos x - cos 9x sin x

Eight hundred thirty six thousand in standard form

An ordinary deck of 52 playing cards is randomly divided into 4 piles of 13 cards each. Let F be the event that the aces of spades and diamonds are in di↵erent piles, and E be the event that the aces of hearts, spades and diamonds are in di↵erent

Find the mean, median, and mode of the data. 67, 59, 34, 71, 59

Salma purchased a prepaid phone card for $15 Long distance calls cost 6 cents a minute using this card. Salma used her card only once to make a long distance call. If the remaining credit on her card is $13.14 how many minutes did her call last?

Is a negative plus positive is negative

A number increased by 29 is 40

What is the vertex of the quadratic functio f (x) = (x-6) (x+2) ?