a first number plus twice a second number is 21. twice the first number plus the second totals 24. find the numbers.

If n represents a number in the following sequence, the next term in the sequence can be determined by using which of the following expressions? 1, 3, 9, 27 ...

Liam has some dimes and quarters. He has 7 more quarters than he has dimes. If liam has 15 coins in all, which is the value of his coins?

A yogurt costs thirty-five pence. how many yogurts can be bought with £3.00

Factor completely x^2+14x+45 (x + 15) (x + 3) (x + 9) (x + 5) (x - 15) (x - 3) (x - 9) (x - 5)

Martina walked 3/4 of a mile in 1/5 of an hour. at this rate how far can martina walk in one hour

Which decimal is greater than 2.234

How do you write 4.51 Ã - 103 in standard form?

How do you graph 1/4x+y=3

Find the prime factorizations of 36 and 1300

The number of pages that Armando, Billy, Robert, and Joel can read in a day is shown below. Armando read 15% of his 46-page book. Billy read 11% of his 72-page book. Robert read 12% of his 68-page book. Joel read 14% of his 69-page book.