Three postal workers can sort a stack of mail in 20 minutes, 25 minutes, and 100 minutes, respectively. Find how long it takes them to sort the mail if all three work together.

The answer must be a whole number

I need to find what the variable is in this equation - 7+m=-9

Give the first eight terms of the sequence defined recursively by t1 = 3, t2 = 5, and tn = tnn-1 - tn-2

For the equation 3 (7 + x) = 3x + k, which value of k will create an equation with no solutions A. x B. 3x C. 15 D. 21

Malia is making a bead necklace. It will have 24 beads when she finishes. This is the beginning of her necklace.

Citizens under the age of 18 are not allowed to vote." Part A: Write an inequality to show the age of citizens who are allowed to vote. Part B: Describe in words how you can show the solution to this inequality on a number line.

Given sin (theta) = -1, find sec (theta) a. - 1 b. 0 c. 1 d. undefined Given cos (theta) = 1, find (theta) a. 90° b. 270° c. 0° d. 180°

Gavyn drives at a speed of 50 miles per hour. How long will it take to drive 225 miles?

Whats the answer to 8x+x=18

Evaluate the factorial expression. 200!/199!

The graph shows the dilation of ΔABC with the origin as its center. Which rule describes this transformation? A) (x, y) → (2x, 2y) B) (x, y) → (0.5x, 0.5y) C) (x, y) → (x + 2, y + 2) D) (x, y) → (x - 2, y - 2)