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2 years ago

4. Parker has saved $1,200 for him and his

Mathematics

1 answer:

TEA [102]2 years ago

7 0

Answer:

To be honest i dont even know

Step-by-step explanation:

ummmm

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Pleaseeee Select the expression that correctly calculates the perimeter of this shape. 7 cm 7 cm

jasenka [17]

77 I hope this helps bye

7 0

3 years ago

When a certain number x is multiplied by 3 and then add 4. The result is 19

rewona [7]

Hey there! I'm happy to help!

Here is our equation.

3x+4=19

We subtract 4 from both sides.

3x=15

We divide both sides by 3.

x=5.

Have a wonderful day! :D

8 0

3 years ago

What is the opposite of -8? :D

VMariaS [17]

<h3>The answer is:</h3><h2>8</h2><h2 />

We know that the opposite of 8 is -8. So the opposite of -8 is 8.

You can look a number line if you are still confused!

8 0

2 years ago

Read 2 more answers

Which of the following represents a relation that is NOT a function? A. X 7 -5 10 -7 Y 34 32 40 34 B. X -7 -5 -7 2 Y 34 32 40 34

Nostrana [21]

The x-value of -7 shows up more than once in relation ...
B. X -7 -5 -7 2 Y 34 32 40 34

_____
When there is more than one y-value for an x-value, the relation is NOT a function.

8 0

3 years ago

Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of th

AURORKA [14]

Answer:

95% confidence interval for the population standard deviation of the lifetimes of the batteries produced by the manufacturer.

(8.889, 11.7106)

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given sample size 'n' = 23

Mean of the sample x⁻ = 10.3

Standard deviation of the sample (s) = 2.4

Level of significance = 0.05

Degrees of freedom = n-1 = 23-1 =22

<u><em>Step(ii)</em></u>:-

95% confidence interval for the population standard deviation of the lifetimes of the batteries produced by the manufacturer.

$(x^{-} - t_{\frac{\alpha }{2} } \frac{S}{\sqrt{n} } , x^{-} +t_{\frac{\alpha }{2} } \frac{S}{\sqrt{n} } )$

$(10.3 - t_{\frac{0.05}{2} } \frac{2.4}{\sqrt{23} } , 10.3 +t_{\frac{0.05}{2} } \frac{2.4}{\sqrt{23} } )$

(10.3 - 2.8188 (0.50043) , 10.3 + 2.8188(0.50043)

(10.3-1.4106 , 10.3+1.4106)

(8.889, 11.7106)

<u><em>final answer</em></u>:-

95% confidence interval for the population standard deviation of the lifetimes of the batteries produced by the manufacturer.

(8.889, 11.7106)

8 0

3 years ago