Find the least common denominator for the following rational expressions.

18/r - 4, - 5r/r^-5r+4, r+7/r^-4r-5

o (1-1) (r - 4) (r-5)

o (r - 1) (r + 4) (r-5)

0 (-1) (r + 1) (r-4) (r-5)

(r - 1) (r + 1) (r + 4) (-5)

Find the difference 77/8-31/4

In 2010, Josh purchased a house for $110,000. In 2014, the house was valued at $105,000. What is the rate of change for the value per year?

For three consecutive numbers, the sum of the first number, twice the second, and 7 less than the third is 133. What are the three numbers?

Samantha's notebook has 14 pages more than three times as much as Lisa's notebook. If Samantha's notebook has 260 pages, how many pages are there in Lisa's notebook?

Whats the gcf of 32 and 52

Sabrina has designed a rectangular painting that measures 65 feet in length and 30 feet in width. Alfred has also designed a rectangular painting, but it measures x feet shorter on each side. When x = 3, what is the area of Alfred's painting?

Miko's restaurant bill was $16. She used the expression 1.18 (16) to find the total cost, including an 18% tip. Which expression is equivalent to the amount Miko paid? (1+0.18) 16 (16+0.18) 16 16 + 1.18 1+0.18 (16)

There are 8 Apples and some bananas on the counter. Someone buys 3 apples. Now there are 4 more bananas than apples. How many bananas are there?

You sold the most for your school's fundraiser so you get to enter the cash vault. There are $1, $5,$10 and $20 bills. The probability of picking a $1 bill is 48%, a $5 bill is 26%, a $20 bill is 10%. What is the probability of picking a $10 bill?

Factor out the greatest common factor from the polynomial 9x-27y+9=