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OleMash [197]
3 years ago
5

Gieo một con xúc xắc hai lần. Tìm xác suất để được tổng số chấm của hai mặt bằng 8?

Mathematics
1 answer:
vovangra [49]3 years ago
5 0
I don’t knowwwwwwwwwww
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Solve the system of linear equations by substitution.<br> 2x-y=3<br> x+5y=14
adoni [48]
Let 2x – y = 3 ——— equation 1

Let x + 5y = 14 ——— equation 2

Making x the subject in eqn 1, = x = y + 3 / 2 ——— eqn 3

• Put eqn 3 in eqn 2

(y + 3 / 2) + 5y = 14

6y = 14 – 3/2

6y = 25/2

y = 25/12

• put y = 25/12 in eqn 3

x = (25/12 + 3/2)

x = 43/12
4 0
3 years ago
13. Given the following historical data and weights of .5, .3, and .2, what is the three-period weighted moving average forecast
Ostrovityanka [42]

Answer:

b. 144.8

Step-by-step explanation:

When calculating the moving average estimate of an observation , each of the observations are usually computed with the same weighted . In some cases, it is  beneficial to assign different  weight on the observations  such that the observation closer to the time period being forecast, has higher weight.  This is refer to as weighted moving average technique. The sum of the individual weight in a weighted moving average technique must equal to 1.

The three-period weighted moving average forecast for period 5 = 144*0.5 + 148 *0.3 + 142 *0.2 =  144.8

4 0
3 years ago
Researchers are conducting a study in an attempt to establish a linear relationship between the number of online music video vie
Charra [1.4K]

Answer:

d. 0.0948 ± 4.032(0.0279)

Step-by-step explanation:

A 99% confidence interval for the coefficient of promotional expenditures is, First, compute the t critical value then find confidence interval.

The t critical value for the 99% confidence interval is,  

The sample size is small and two-tailed test. Look in the column headed es = 0.01 and the row headed in the t distribution table by using degree of freedom is here

for (n-2=5) degree of freedom and 99% confidence ; critical t =4.032

therefore 99% confidence interval for the slope =estimated slope -/+ t*Std error

= 0.094781123 -/+ 4.032* 0.027926367 = -0.017822 to 0.207384

3 0
3 years ago
I attached the math problem below and I hope u guys help me. Thxs to who's gonna answer!
vova2212 [387]

Answer:

Numbers | least to greatest | opposites | opposites least to greatest

1/4, -1/2    | -1/2, 1/4                | -1/4, 1/2     | -1/4, 1/2

2, -10        | -10, 2                   | -2, 10         | -2, 10

0, 3 1/2     | 0, 3 1/2                | 0, -3 1/2    | -3 1/2, 0

-5, -5.6     | -5.6, -5                 | 5, 5.6       | 5, 5.6

24 1/2, 24 | 24, 24 1/2            | -24 1/2 -24 | -24 1/2 -24

-99.9, -100 | -100, -99.9         | 99.9, 100 | 99.9, 100

-0.05, -0.5  | -0.5, -0.05         | 0.5, 0.05 | 0.05, 0.5

-0.7, 0       | -0.7, 0                  | 0.7, 0       | 0, 0.7

100.02, 100.04 | 100.02, 100.04 | -100.02, -100.04 | -100.04, -100.02

Hope this helps you!!!!

8 0
2 years ago
Eva wants to make two pieces of pottery. She needs 3/5 pound of clay for one piece and 7/10 pound of clay for the other piece. S
kow [346]
The answer is 1.1 pounds left.
4 0
3 years ago
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