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Sholpan [36]
3 years ago
13

What is the answer to ax + 7 = 8x + b when x=9

Mathematics
1 answer:
xxTIMURxx [149]3 years ago
6 0

Hey there!

ax + 7 = 8x + b

when x=9, so:

a(9) +7= 8(9) +b

9a +7= 72+b

I hope this helps?

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Volgvan
On a coordinate plane, any movement up and down is on the y-axis. So if your parallelogram is moving down 2.5 units, then the y-values of each vertice will go down by 2.5:
A(-2, -8), B(-4, -8), C(-3, -4.5), D(-1, -4.5)

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Explain how comparing 645 and 738 is different from comparing 645 and 649
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What is the factor x²+6x+​
Lera25 [3.4K]

Answer:

this is what i found

Factor  

x  out of  x  2 .  x ⋅  x −  6 x  Factor  x  out of  − 6 x .  x ⋅ x  + x ⋅ − 6  Factor  x  out of  x ⋅ x + x ⋅ − 6 . x ( x − 6  )

8 0
2 years ago
20 point REWARD + Brainleist &lt;3
jek_recluse [69]
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5 0
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Read 2 more answers
In answering a question on a multiple-choice test, a student either knows the correct answer or guesses it. Let 0.7 be the proba
Dahasolnce [82]

Answer:

The probability is 0.9211

Step-by-step explanation:

Let's call K the event that the student know the answer, G the event that the student guess the answer and C the event that the answer is correct.

So, the probability P(K/C) that a student knows the answer to a question, given that she answered it correctly is:

P(K/C)=P(K∩C)/P(C)

Where P(C) = P(K∩C) + P(G∩C)

Then, the probability P(K∩C) that the student know the answer and it is correct is:

P(K∩C) = 0.7

On the other hand, the probability P(G∩C) that the student guess the answer and it is correct is:

P(G∩C) = 0.3*0.2 = 0.06

Because, 0.3 is the probability that the student guess the answer and 0.2 is the probability that the answer is correct given that the student guess the answer.

Therefore, The probability P(C) that the answer is correct is:

P(C) = 0.7 + 0.06 = 0.76

Finally, P(K/C) is:

P(K/C) = 0.7/0.76 = 0.9211

7 0
3 years ago
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