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larisa86 [58]
3 years ago
8

Simplify the following expression and show your work in details please .

Mathematics
2 answers:
wel3 years ago
6 0

Answer:

9-2b

Step-by-step explanation:

Set up equation:

9 - 8b + 6b

Add like terms

9 - 2b

timurjin [86]3 years ago
4 0
9-8b+6b
You can combine -8b and 6b since it has the same variable.
That leaves
9-2b
Hope that helped!
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A boat is heading towards a lighthouse, whose beacon-light is 126 feet above the water. From point AA, the boat’s crew measures
vredina [299]

Using the slope concept, it is found that the distance from point A to point B is of 887 feet.

<h3>What is a slope?</h3>

The slope is given by the <u>vertical change divided by the horizontal change</u>.

It's also the tangent of the angle of depression.

In this problem, the vertical change is of 126 feet.

At point A, the angle is of 6º, while the horizontal position is of x_A, hence:

\tan{6^\circ} = \frac{126}{x_A}

x_A = \frac{126}{\tan{6^\circ}}

x_A = 1198.8

At point B, the angle is of 22º, while the horizontal position is of x_B, hence:

\tan{22^\circ} = \frac{126}{x_B}

x_B = \frac{126}{\tan{22^\circ}}

x_B = 311.9

Hence, the distance in feet is of:

d = x_A - x_B = 1198.8 - 311.9 \approx 887

More can be learned about the slope concept at brainly.com/question/18090623

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Alexandra [31]

Answer:

14.8

Step-by-step explanation:

7.4 * 2 = 14.8.

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