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zhuklara [117]
2 years ago
8

What is the answer for 9x² + 3xy - 12x - 4y ​

Mathematics
2 answers:
Lostsunrise [7]2 years ago
4 0

Answer:

{ \tt{9 {x}^{2} + 3xy - 12x - 4y }} \\  ={ \tt{x(9x + 3y - 12) - 4y}}

Sphinxa [80]2 years ago
3 0

Answer:

(3x + y)(3x - 4)

Step-by-step explanation:

9x² + 3xy - 12x - 4y ​=

There is no common factor in the 4 terms.

Since there are 4 terms, we try factoring by grouping.

Find a common factor in the first two terms, and find a common factor in the last two terms.

= 3x(3x + y) - 4(3x + y)

Now factor out the common factor 3x + y.

= (3x + y)(3x - 4)

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cylinder with height 9 inches and radius is filled with water, it can fill a certain pitcher. How many of these pitchers can a c
larisa [96]

Answer:

4

Step-by-step explanation:

The 1st cylinder used to fill the pitcher has:

height:

h = 9 in

radius:

r = r

The volume of a cylinder is given by:

V=\pi r^2 h

Therefore, the volume of the 1st cylinder is

V=\pi r^2 9=9\pi r^2

We are told that the water inside this cylinder can fill a certain pitcher, so this is also the volume of the pitcher.

Then, we have a second cylinder, which has height

h = 9 in

and radius

r' = 2r

So the volume of this cylinder is

V'=\pi r'^2 h = \pi (2r)^2 9 =9\pi (4r^2)=36\pi r^2

This means that the number of pitchers that can be filled by this 2nd cylinder is

n=\frac{V'}{V}=\frac{36\pi r^2}{9\pi r^2}=4

8 0
3 years ago
Can I reduce 40 over 83
kicyunya [14]

Answer:

no, you cant reduce 83

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
BRAINLIEST BRAINLIEST!! Easy math ASAP
Katena32 [7]
First answer is (-2,2) second answer is (4,2)
3 0
3 years ago
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Two times a number plus 3 equals one half of the number plus 30. What is the number please?
Zanzabum

Answer:

Step-by-step explanation:

2*x + 3 = 1/2x + 30             Subtract 3 from both sides

<u>       - 3                -3</u>

2x = 1/2x + 27                     Subtract 1/2 x from both sides

<u>1/2 x  -1/2 x</u>

1 1/2 x = 27                         change 1 1/2 to 3/2

3/2 x = 27                           Multiply by 2/3

2/3 * 3/2x = 27 * 2/3

x = 18

7 0
2 years ago
HELPPP ASAPPP
kakasveta [241]

Answer:

Option C (The mean would decrease).

Step-by-step explanation:

In this question, there are 16 observations and their mean is 80. There is an outlier which has the value 91. This means that the outlier is on the greater side of the mean. The formula for mean is:

Mean = Sum of observations/Number of Observations.

Sum of observations can be calculated by substituting the values in the above formula.

80 = Sum/16.

Sum = 80*16 = 1280.

Subtracting 91 from the total sum will give the sum of rest of the 15 non-outlier values. Therefore 1280 - 91 = 1189.

Calculating the mean of the 15 values:

Mean = 1189/15 = 79.267 (correct to 3 decimal places).

It can be seen that removing the outlier decreases the mean. Therefore C is the correct answer. The information regarding the median cannot be determined since actual values are not present, which are required to calculate the median. Therefore, C is the correct choice!!!

8 0
3 years ago
Read 2 more answers
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