first you do anything in parentheses. which is 2+1. then you do what is in the brackets which is 13-3 which is 10. then all that is left is 8+10 and you get 18.

7 0

4 years ago

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The diameter of the moon is 2,160 miles. A model has a scale of 1 in : 150 mi. What is the diameter of the model?

Charra [1.4K]

Answer:

The diameter of the model is 14.4 inches.

Step-by-step explanation:

The Diameter of the moon = 2,160 miles

The scale on the model represents 1 in = 150 miles

Let the model represents k inches in 2,160 miles.

So, by the Ratio of Proportionality:

$\frac{1}{150} = \frac{k}{2160}$

⇒ $k = \frac{2160}{150} \\\implies k = 14.4$

or, k = 14.4 inches

⇒On the scale 2160 miles is represented as 14.4 inches

Hence the diameter of the model is 14.4 inches.

3 0

3 years ago

Which coordinate pair identifies a point in the third quadrant of the coordinate plane?

AlexFokin [52]

It’s D ............................

8 0

3 years ago

Solve 6(x + 1) > 2x - 1

marissa [1.9K]

Answer:

x>-7/4

Step-by-step explanation:

6(x+1)>2x-1

Solve for x:

$6x+6>2x-1\\\\6x-2x+6>2x-2x-1\\\\4x+6>-1\\\\4x+6-6>-1-6\\\\4x>-7\\\\x>-\frac{7}{4}$

7 0

4 years ago