1. Higher Order Thinking Josh used

an algorithm to find the product for

9 x 239. His work is shown below.

Is Josh's work correct? Explain.

239

X 9

1,800

270

+ 81

2,151

What is the surface area of a triangular pyramid if each face has an area of 80 m2? A. 240 m2 B. 160 m2 C. 320 m2 D. 20 m2

The cost of fuel to propel a boat through the water (in dollars per hour) is proportional to the cube of the speed v. a certain ferry boat uses $100 worth of fuel per hour when cruising at 10 miles per hour.

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The triangles are similar. If DE=32, EF=24, and BC=6, find AB

5. (9x - 8) - (x + 4) =

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