A student wrote four statements during mathclass. Which statement contains errors

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?