Fred can mow a lawn in 60 minutes. rocky can mow the same lawn in 40 minutes. how long does it take for both fred and rocky to mow the lawn if they are working together? express your answer as a reduced fraction.

Simplify | 43 - 99 | - | 75 + 21|.

Use substitution to solve each system of equations c-5d=2 2c+d=4

Of the 652 passengers on a cruise ship, 30 attended the magic show. What is the sample? What is the population?

Solve |4x - 8| < 12 -12 < x < 12 x -1 < x < 5

Write as the product of the of the GCf and the sum of two numbers 15+25

the distance between two towns on a map is 6cm. the actual distance between 2 towns is 48km what is the scale on the map

Which number is a factor of 56? A. 37 B. 7 C. 9 D. 144

The largest exponent of a polynomial determines the what?

A determined gardener has 120ft of deer-resistant fence. She wants to enclose a rectangular vegetable garden in her backyard, and she wants the area that is enclosed to be at least 800 square feet.

a large snow plow can clear the west main parking lot in 4 hours. A small snowplow needs more time to clear that lot. working together, they can clear the lot in 3 hours. how long would it take the small plow to clear the lot by itself?