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Dominik [7]
3 years ago
7

If a+b-c=3 what is the value of 4(a+b-3)-(a+b+3c)?

Mathematics
1 answer:
Makovka662 [10]3 years ago
8 0

3abc

Step-by-step explanation:

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3 years ago
A tourist looks out from the observation deck of the Space Needle in Seattle. The deck is at a height of 520 ft. She sees her fr
WARRIOR [948]

Answer:

Last option 527.7 ft

Step-by-step explanation:

From the diagram attached we can see the angle of depression is 80.2 which is equal to ∠ACB (alternate angles)

Height of the deck AB = 520 ft. and we have to calculate the distance H between the tourist and her friend.

Sin ∠ACB = \frac{AB}{AC}

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.9854=\frac{520}{H}

H = \frac{520}{.9854} = 570 ft

So the tourist and her friend are 527.7 ft apart.

6 0
3 years ago
How do you factor quadratic expressions with coefficient and without c?
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