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lara [203]
3 years ago
10

Justify each step of the equation solved below using mathematical properties.

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
8 0

Answer:

Please check the explanation!

Step-by-step explanation:

1. -3(x+2)+4=94

Apply distributive law a(b+c)=ab+ac and combine like terms for the second and third steps

2. -3x-2=94

3. -3x-2=94

Add 2 to both sides.

4. -3x=96

Divide both sides by -3.

5. X=-32

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Answer:

She can make 1.6 batches

Step-by-step explanation:

24/15 = 1.6

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✓-90= Ai√B<br> What is the value of A?<br> What is the value of B?
olga2289 [7]

Answer:

A = 3, B = 10

Step-by-step explanation:

\sqrt{-90}

= \sqrt{9(-1)(10)}

= \sqrt{9} × \sqrt{-1} × \sqrt{10}

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in the form Ai\sqrt{B}

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2 years ago
(x-5)(x-7) expand and simplify​
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Answer: = x² - 12x + 35

(x - 5)(x - 7)

= x² - 5x -7x + 35

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Step-by-step explanation:

7 0
3 years ago
Of all the people applying for a certain​ job, 80% are qualified and 20​% are not. The personnel manager claims that she approve
motikmotik

Answer:

69.23% probability that a person is not qualified if he or she was not approved by the manager.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes:

In this problem, we have these following probabilities:

80% probability that a person is qualified

20% probability that a person is not qualified.

90% probability that a qualified person is approved.

10% probability that a qualified person is not approved.

10% probability that an unqualified person is approved.

90% probability that an unqualified person is not approved.

Find the probability that a person is not qualified if he or she was not approved by the manager.

Desired outcomes

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20% are not qualified. Of those, 90% were not approved. So

0.9*0.2 = 0.18

Total outcomes:

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80% are qualified. Of those, 10% were not approved

20% are not qualified. Of those, 90% were not approved. So

0.8*0.1 + 0.9*0.2 = 0.26

Probability

P = \frac{0.18}{0.26} = 0.6923

69.23% probability that a person is not qualified if he or she was not approved by the manager.

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3 years ago
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enyata [817]
The answer is A. The square root of 100 is ten because ten times ten is 100.
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3 years ago
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