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iren2701 [21]
3 years ago
7

What is the answer to 2(5x-8)+6=11

Mathematics
1 answer:
Reptile [31]3 years ago
6 0

Answer:

x = \frac{21}{10}

Step-by-step explanation:

First distribute the 2 into the parentheses

2 · 5x - 8 · 2 + 6 = 11

Keep simplifying

10x -16 + 6 = 11

10x -10 = 11

10x = 21

x = \frac{21}{10}

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Heights​ (cm) and weights​ (kg) are measured for 100 randomly selected adult​ males, and range from heights of 133 to 193 cm and
yawa3891 [41]

Answer:

The weight of an adult male who is 172 cm tall is 89.36 kg.

Step-by-step explanation:

The regression equation representing the relationship between height and weight of a person is:

\hat y=-105+1.13x

Here

<em>y</em> = weight of a person

<em>x</em> = height of a person

The information provided is:

\bar x=167.90\ cm\\\bar y=81.47\ kg\\r (X, Y) = 0.228\\p-value=0.023\\\alpha =0.05

The hypothesis to test the significance of the correlation between height and weight is:

<em>H₀</em>: There is no relationship between the height and weight, i.e. <em>ρ</em> = 0.

<em>Hₐ</em>: There is a relationship between the height and weight, i.e. <em>ρ </em>≠ 0.

Decision rule:

If the <em>p</em>-value of the test is less than the significance level, then the null hypothesis will be rejected and vice-versa.

According to information provided:

<em>p</em>-value = 0.023 < <em>α</em> = 0.05

The null hypothesis was rejected at 5% level of significance.

Thus, concluding that there is a relationship between the height and weight.

Compute the weight of an adult male with height, <em>x</em> = 172 cm as follows:

\hat y=-105+1.13x

  =-105+(1.13\times 172)\\=-105+194.36\\=89.36

Thus, the weight of an adult male who is 172 cm tall is 89.36 kg.

5 0
3 years ago
What is csc of angle b<br> reduce fractional answer to lowest terms
Evgen [1.6K]

Answer: about61

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
the cost C (in dollars) of making n watches is represented by C = 15n + 85. How many watches are made when the cost is $385?
liberstina [14]
20 watches are made since 385 = 15n + 85. 385 - 85 is 300 and 300 divides by 15 is 20.
4 0
3 years ago
Read 2 more answers
Riley used a drawing to divide . He made groups of 12 with 1 left over. Hoy many groups did he make?
Yakvenalex [24]

Step-by-step explanation:

Here important information is missing. That is total number of divide.

However, it is given that riley made groups of 12 with 1left over from total number of divide. So, total number of divides on the drawing must be a multiple of 12 +1. It can be any number like 12n+1, where n is an integer. Then we ca find total number of group.  

5 0
2 years ago
If 2n + 3(2- 2n) = 14 what is the value of n? (Please give the correct answer, I will give brainliest)
allochka39001 [22]

Answer:

  n = -2

Step-by-step explanation:

Eliminating parentheses, you have ...

  2n +6 -6n = 14

Combining terms and subtracting 6, you get ...

  -4n = 8

Dividing by the coefficient of n gives ...

  n = -2

_____

<em><u>Check</u></em>

  2(-2) +3(2 -2(-2)) = 14

  -4 +3(2+4) = 14

  -4 +3(6) = 14

  -4 +18 = 14 . . . . answer checks OK

5 0
3 years ago
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