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shepuryov [24]
3 years ago
15

3x – 9 = -15 What is X

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
6 0

Answer:

2

Step-by-step explanation:

3 x 2 - 9=15

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A farm is 9 in wide and 6 in tall. if it is redused to a width of 3 in then how tall will it be
lora16 [44]
It will still be 6 units high. Even if the width is reduced, that does not effect the height of  the farm.
4 0
4 years ago
Two sides of a triangle have the following measure of 7,8.what is the range of possiable values for the 3rd side?
astraxan [27]
The third side of the triangle could be between 1 and 15 units, exclusive. This is because there is a theorem in geometry that states that, if you add 2 of a triangle's sides, the third side has to be less than the sum of the first two sides. This means that the third side has to be less than 8 + 7 = 15. So the third side is less than 15 units. This also means that the third side plus another side has to be greater than the last side. To find the minimum value, you take the smallest side, in this case, 7, and create an inequality. The inequality would be 7 + x [the third side] > 8. Solving this inequality, you get that x > 1. This means that 1 < x < 15. That is the range of values for the third side.
5 0
4 years ago
Help me to do this question plz plz plz <br>I will make you as brainlist plz​
Mademuasel [1]

Answer:

1. 5

2. 12

3. a. 12

3. b. 18

Step-by-step explanation:

1. 50 - 45 = 5.

2. 26 - 18 = 8. 30 - 18 = 12. 12 + 8 = 20. 20 + 18 = 38. 50 - 38 = 12.

3. a. 24 - 12 = 12.

4. 40 - 12 = 28. 24 - 12 = 12. 28 + 12 + 12 = 52. 70 - 52 = 18.

7 0
3 years ago
A shelf can support 3 and 3/4 pounds.
kogti [31]
Part a: ten books. because 3.75 equals 15/4 or 30/8. 10 3/8's fit into 30/8, so 10 books

part b: do basically the same thing and you will get 14 books though
7 0
3 years ago
Find the standard deviation. Round to the nearest tenth. 1, 2, 11, 8, 16, 16,20, 16, 18 OA. 6.5 O B. 6.9 O C. 1.5 ? D. 7.4
NikAS [45]

Answer:

A. 6.5

Step-by-step explanation:

First we find the average  \bar{x} of the 9 data:

\bar{x} =\frac{\sum_{x=1}^{n}x_{i}}{n}

Where n is the data number, that in this case is 9.

\bar{x} =\frac{1+ 2+ 11+ 8+ 16+ 16+20+ 16+ 18}{9}=12\\

The formula of the standard deviation \sigma is:

\sigma=\sqrt{\frac{\sum_{x=1}^{n}(x_{i}-\bar{x})^{2}}{n}}

We replace the data and find the value of the standard deviation:

\sigma=\sqrt{\frac{(1-12)^{2}+(2-12)^{2}+(11-12)^{2}+(8-12)^{2}+(16-12)^{2}+(16-12)^{2}+(20-12)^{2}+(16-12)^{2}+(18-12)^{2}}{9}}

\sigma=\sqrt{\frac{(-11)^{2}+(-10)^{2}+(-1)^{2}+(-4)^{2}+(4)^{2}+(4)^{2}+(8)^{2}+(4)^{2}+(6)^{2}}{9}}=6,54

We approximate the number and the solution is 6,5

6 0
4 years ago
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