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Sliva [168]
3 years ago
7

Select the ordered pair that is solution of this equation x+2y=3

Mathematics
2 answers:
muminat3 years ago
6 0

Answer:

1+2=3

Step-by-step explanation:

shutvik [7]3 years ago
4 0
1+2=3
Thats rhe answer
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A researcher estimates the 90% CI for a sample with a mean of M = 8.9 and a standard error (sigma_M) of 2.1. What is the confide
Shalnov [3]

Answer:

The confidence interval at this level of confidence is between 5.4455 and 12.3545.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find M as such

M = z*s

In which s is the standard deviation of the sample, which is also called standard error. So

M = 1.645*2.1 = 3.4545

The lower end of the interval is the sample mean subtracted by M. So it is 8.9 - 3.4545 = 5.4455

The upper end of the interval is the sample mean added to M. So it is 8.9 + 3.4545 = 12.3545

The confidence interval at this level of confidence is between 5.4455 and 12.3545.

4 0
4 years ago
In making a fruit punch for a party, you mixed 1/2 gallon of grape juice with 1/5 gallon of orange juice. How many gallons of pu
butalik [34]
The answer is 7/10 the common demontior is 10 so the numbers change to 2/10 + 5/10 witch equals 7/10
5 0
3 years ago
Read 2 more answers
20 points. Brilliant ranking.<br> Plese help me. HOMWORK DUE TODAY.
IgorC [24]
Here, Equation would be: 3.2x = 48
Where, x = 1 cm for certain distance in real
x = 48/3.2
x= 15

In short, Your Answer would be 15 Feet

[ Other Screenshot question has been answered ] 

Hope this helps!
4 0
3 years ago
You measure the lifetime of a random sample of 64 tires of a certain brand. The sample mean is x¯=50 months. Suppose that the li
Anni [7]

Answer:

(48.3875, 51.6125)

Step-by-step explanation:

At 99% level of significance

\alpha=1-0.99=0.01

Z_{a\lpha /2}=0.01/2=0.005

From the normal standard deviation table Z_{a\lpha /2}=2.33

Considering that

\bar x ± Z_{a\lpha /2} \frac {\sigma}{\sqrt{n}}=50±2.33\frac {5}{\sqrt {64}}

50±2.33(0.625)=50±1.6125=(48.3875, 51.6125)

Therefore, there’s 99% confidence that the mean lifetime of a certain brand of tires is between 48.3875 and 51.6125

3 0
3 years ago
Draw a number line to divide 70÷5
defon
If you need help the answer is 14 use long division or just subtract all depending on what the numbers are.
4 0
3 years ago
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