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IgorLugansk [536]
2 years ago
13

What is 9/4 + 2/3 please help me

Mathematics
2 answers:
Reptile [31]2 years ago
8 0

Answer:

2 11/12 or 35/12

Step-by-step explanation:

malfutka [58]2 years ago
3 0
Result
9
4
+
2
3
=
35
12
=
2 11
12
Result in decimals: 2.9166666666667

Calculation steps:
9
4
+
2
3
=
9 × 3
4 × 3
+
2 × 4
3 × 4
=
27
12
+
8
12
=
27 + 8
12
=
35
12
=
2 11
12
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Meteorologists in Texas want to increase the amount of rain delivered by thunderheads by seeding the clouds. Without seeding, th
Dafna11 [192]

Answer:

<em>There is no significant difference in the amount of rain produced when seeding the clouds.</em>

Step-by-step explanation:

Assuming that the amount of rain delivered by thunderheads follows a distribution close to a normal one, we can formulate a hypothesis z-test:

<u>Null Hypothesis </u>

\bf H_0: Average of the amount of rain delivered by thunderheads without seeding the clouds = 300 acrefeet.

<u>Alternative Hypothesis </u>

\bf H_a: Average of the amount of rain delivered by thunderheads by seeding the clouds > 300 acrefeet.

This is a right-tailed test.

Our z-statistic is  

\bf z=\frac{370.4-300}{300.1/\sqrt{30}}=1.2845

We now compare this value with the z-critical for a 0.05 significance level. This is a value \bf z^* such that the area under the Normal curve to the left of \bf z^* is less than or equal to 0.05

We can find this value with tables, calculators or spreadsheets.

<em>In Excel or OpenOffice Calc use the function </em>

<em>NORMSINV(0.95) </em>

an we obtain a value of  

\bf z^* = 1.645

Since 1.2845 is not greater than 1.645 we cannot reject the null, so the conclusion that can be drawn when the significance level is 0.05 is that there is no significant difference in the amount of rain produced when seeding the clouds.

8 0
3 years ago
A unit rate compares a quantity to
andrey2020 [161]
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8 0
3 years ago
The ratio of workers to supervisors and factories 32 to 2. The ratio of male workers to female workers is 6 to 5. If there are 8
Margarita [4]

Answer:

The number of supervisor in the factory is 9 .

Step-by-step explanation:

Given as :

The ratio of workers to supervisors and factories 32 : 2

let the number of workers = 32 x

And The number of supervisors = 2 x

The ratio of male workers to female workers is 6:5

Let The number of male workers = 6 y

And The number of female worker = 5 y

The number of female workers at the plant = 80

So, 5 y = 80

∴  y = \frac{80}{5}

I.e y = 16

So, The number of male workers = 6 y = 6 × 16 = 96

Thus The Total number of worker in the factory =  The number of male workers + The number of female workers at the plant

Or, The Total number of worker in the factory = 96 + 80 = 146

Now , Again

∵ The ratio of workers to supervisors in factories 32 : 2

So, The number of workers = 32 x

I.e 146 = 32 x

∴ x = \frac{146}{32} = 4.5

So, The number of supervisors = 2 x = 2 × 4.5 = 9

Hence The number of supervisor in the factory is 9 . Answer

3 0
3 years ago
Read 2 more answers
How do i do this?????????
bagirrra123 [75]
(x+3)-2 that is your answer I know because I'm great at this unit
8 0
3 years ago
What are the domain and range of f(x) = log(x+b) - 4?
Gnesinka [82]

Answer:

I'm probably to late but i took the test and the answer is B.

domain: x > –6; range: all real numbers.

Hope This Helped!

8 0
3 years ago
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