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motikmotik
3 years ago
12

Rewrite the equation for x, and express its value in terms of a. 3/a x - 4 = 20

Mathematics
1 answer:
My name is Ann [436]3 years ago
7 0

For this case, we must clear variable "x" from the given equation, expressed in terms of "a".

We have:

3/a x-4=20

By clearing "x" we have:

Adding 4 to both sides of the equation:

3/a x = 20 + 4

Multiplying by a/3 on both sides of the equation:

x=24a/3

x=8a

So, x=8a

Answer:

x=8a

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Answer and explanation:

Given : A driving exam consists of 29 ​multiple-choice questions. Each of the 29 answers is either right or wrong. Suppose the probability that a student makes fewer than 6 mistakes on the exam is 0.26 and that the probability that a student makes from 6 to 20 ​(inclusive) mistakes is 0.53.

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To find : The probability of each of the following outcomes.

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P(X>20)=0.21

b. A student makes 6 or more mistakes

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c. A student makes at most 20 mistakes

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d. Which two of these three events are​ complementary?

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Option a and c are complementary events.

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Answer:

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