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Nana76 [90]
2 years ago
11

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP

Mathematics
2 answers:
irga5000 [103]2 years ago
8 0

Answer:

a = 16. both solve and check are below.

Step-by-step explanation:

6 = a/4 + 2 is the equation given.

you have to isolate the a/4, which is by cancelling out the 2. we cancel the 2 out by subtracting 2 from both sides.

6 - 2 = a/4 + 2-2

you get the equation now:

4 = a/4

isolate a by doing the inverse operation that it is currently in. in this case, the operation they use is division. so inverse of it would be multiplication.

4*4 = a/4*4

a = 16

──────────────────

if you want to check it, you plug in a with 16 and use the PEMDAS method.

6 = 16/4 + 2

6 = 4 + 2

the equation is true, thus in a is equal to 16.

Leviafan [203]2 years ago
6 0

Answer:

a=16

Step-by-step explanation:

First of all you subtract both sides by 2 which makes 6-2=a/4 +2-2 which makes 4=a/4. then you multiply both sides by 4,  4x4=a/4 x 4 which makes a= 16 now you check this by putting a into the equation then going 16/4=4 then adding 2,  4+2= 6 then checking if it equals which it does

Would be amazing if you marked brainliest :)

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Question
hichkok12 [17]

Answer:

Area: 201.06

Circumference:50.26

Step-by-step explanation:

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_________________________________________________

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4 0
2 years ago
There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is appro
elena55 [62]

Answer:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

Two exams. The exam that you did score better is the one in which you had a higher zscore.

The composite score on Exam A is approximately normally distributed with mean 20.1 and standard deviation 5.1.

This means that \mu = 20.1, \sigma = 5.1.

You scored 24 on Exam A. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{24 - 20.1}{5.1}

Z = 0.76

The composite score on Exam B is approximately normally distributed with mean 1031 and standard deviation 215.

This means that \mu = 1031, \sigma = 215.

You scored 1167 on Exam B, s:

Z = \frac{X - \mu}{\sigma}

Z = \frac{1167 - 1031}{215}

Z = 0.632

You had a better Z-score on exam A, so you did better on that exam.

The correct answer is:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

3 0
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Answer:

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3 years ago
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