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KonstantinChe [14]
3 years ago
13

Find the value of x. 3x(5+2)=16

Mathematics
2 answers:
Iteru [2.4K]3 years ago
8 0

Answer:

16/21

Step-by-step explanation:

We are given the equation 3x(5 + 2) = 16.

By order of operations, let's add the two numbers in the parentheses first:

3x(5 + 2) = 16

3x(7) = 16

Now, we must multiply 3x by 7:

3x * 7 = 16

21x = 16

Divide both sides by 21:

x = 16/21

The answer is thus 16/21.

<em>~ an aesthetics lover</em>

Serhud [2]3 years ago
3 0

Answer: x=0.8

Step-by-step explanation:

Distribute

3x*5=15x

3x*2=6x

15x+6x=21x

21x=16

divide 21 on both sides

x=0.76

round

x=0.8

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geometric sequence

\tt U_n=ar^{n-1}

a = 6 = first term

r = ratio = \tt \dfrac{9}{6}

the 6th term (n=6)

\tt U_6=6\times (\dfrac{9}{6})^{6-1}\\\\U_6=6\times \dfrac{9}{6}^5\\\\U_6=\dfrac{9^5}{6^4}=45.5625\rightarrow rounded~to nearest~thousandth=45.563

4 0
2 years ago
A 5-column table has 4 rows. The first column has entries A, B, C, Total. The second column is labeled X with entries 15, 5, 30,
Ugo [173]

Answer:

A and X

Step-by-step explanation:

Got it right on edge-nuity

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2 years ago
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Twice c is equal to 44
Juliette [100K]

Answer:

C=44/2

c=22

Two time c is equal to 44

one time c is equal to 22

5 0
2 years ago
A researcher records the amount of time (in minutes) that parent child pairs spend on social networking sites to test whether th
ki77a [65]

Answer:

(a) A matched pair design is used to perform the test.

(b) Each sample is of size 30.

(c) The null hypothesis is rejected.

(d) The effect size of the test is medium.

Step-by-step explanation:

A statistical experiment is performed to determine whether the amount of time (in minutes) that parent-child pairs spend on social networking sites to test show any generational differences.

<u>Given</u>:

MD = -42 minutes

t₍₂₉₎ = 4.021

p < 0.05

d = 0.49

The hypothesis is:

<em>H₀</em>: There is no difference between the means, i.e. <em>μ₁</em> = <em>μ₂</em>.

<em>Hₐ</em>: There is a significant difference between the means, i.e. <em>μ₁</em> ≠ <em>μ₂</em>.

(a)

A matched pair design is used to perform the test.

In a matched pair design the participant of the two groups are related in some way. For example, the same sample is tested before and after applying the treatment.

In this case the matched are pairs are of children and their parents. And the treatment is the amount of time spent on social networking sites.

(b)

The degrees of freedom of a matched pair design is:

df = n - 1

29 = n - 1

n = 29 + 1

n = 30

Thus, each sample is of size 30.

(c)

The <em>p</em>-value of the test statistic is < 0.05.

If the <em>p</em>-value is less than the significance level <em>α </em>(say, 0.05) then the null hypothesis is rejected and vise-versa.

Since <em>p</em> < 0.05 the null hypothesis is rejected concluding that there is a significant difference between the amount of time spent on social networking sites by parents and children.

(d)

The estimated value of Cohen's d is, <em>d</em> = 0.49.

A Cohen's d value between the range 0.50 to 0.80 is considered as medium.

Thus, the effect size of the test is medium.

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3 years ago
A recipe for chocolate chip cookies mixes 512 cups of cookie dough with 34 cup of chocolate chips and makes 48 cookies. A baker
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Answer:

2

Step-by-step explanation:

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2 years ago
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