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Rashid [163]
2 years ago
9

Solve using the quadratic formula x^2-3x+1=0

Mathematics
1 answer:
Ilia_Sergeevich [38]2 years ago
3 0
I don’t see a GCF or common factor so just use quadratic. 3+- Square root (9-(4))/2
X= ~2.62 or X=~.38
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Two​ researchers, Jaime and​ Mariya, are each constructing confidence intervals for the proportion of a population who is​ left-
egoroff_w [7]

Complete question :

Two researchers, Jaime and Mariya, are each constructing confidence intervals for the proportion of a population who is left-handed. They find the point estimate is 0.13. Each independently constructed a confidence interval based on the point estimate, but Jaime’s interval has a lower bound of 0.097 and an upper bound of 0.163, while Mariya’s interval has a lower bound of 0.117 and an upper bound of 0.173. Which interval is wrong? Why?

Answer:

Mariya's interval

Step-by-step explanation:

Point estimate = 0.13

Mariya's confidence interval :

Lower boundary = 0.117

Upper boundary = 0.173

Jamie's confidence interval :

Lower boundary = 0.097

Upper boundary = 0.163

The correct confidence interval should have an average value equal to the value of the point estimate ;

Jamie's confidence interval average :

(0.097 + 0.163) / 2 = 0.26 / 2 = 0.13

Mariya's confidence interval average :

(0.117 + 0.173) / 2 = 0.29 / 2 = 0.145

Based on the confidence interval average obtained we can conclude that Mariya's interval is wrong as it the average obtained is greater than the point estimate.

0.145 > 0.13

3 0
3 years ago
Solve the system by substitution.
kumpel [21]

Answer:

(-5,1)

Step-by-step explanation:

   

y= 13.5+2.5x

-13.5 -13.5

-13.5= 2.5x

x= -5.4

3 0
3 years ago
Write the opposite to the following:- 50km Towards east​
kap26 [50]

Answer:

50 kilometres towards west .......

i guess

4 0
3 years ago
Explain how a formula can help you solve problems.
geniusboy [140]
For example in physics v=u+at
If you have u, a and t and want to find v, you can substitute the numbers in and work it out.
8 0
3 years ago
One winter week a ski town got 15 1/2 inches of snow. On Monday the town got 2 3/4; on Tuesday it got 1 1/2 times as much; and o
anastassius [24]

Total one winter week snow fall = 15 1/2 inches .

On Monday it's =  2 3/4 inches.

On Tuesday = 1 1/2 times of 2 3/4 inches = 3/2 × 11/4 = 33/8 = 4 1/8 inches.

On Wednesday = 7/8 inches.

<em>Total snow fall on Monday, Tuesday and Wednesday = 2 3/4 inches + 4 1/8 inches +  7/8 inches </em>

= 6 + 3/4 + 1/8 +7/8 = 6 + 6/8 + 1/8 +7/8

= 6 + 14/8 = 6 + 1  6/8 = 7 6/8 or 7 3/4 inches.

<em>In rest of the week the snow fall is = 15 1/2 inches - 7 3/4 inches.</em>

8 inches + (1/2 - 3/4 ) = 8 inches + (2/4 - 3/4 )

8  - 1/4 = 8/1 -1/4

= 32/4 - 1/4

= 31 /4

= 7 3/4 inches.

<h3>Therefore, the town got 7 3/4 inches  snow fall the rest of the week.</h3>
7 0
3 years ago
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