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2 years ago

GIVING BRAINLIEST FOR FIRST. Pls answer in BOTH BOXES.

Mathematics

1 answer:

Anvisha [2.4K]2 years ago

8 0

Answer:

(y=2x-3)(y=2x-2)

Step-by-step explanation:

no need just do it like me

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32/3.2 = 3.2c/3.2

c = 32/3.2

c = 10

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Find the solution of the system of equations.

Dima020 [189]

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3 years ago

All but one of the following cannot be used internationally

Karolina [17]

Answer:

<h2>I think national flag cannot be used internationally</h2>

Step-by-step explanation:

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2 years ago

An hourglass, composed of two identical cones, is 12 cm tall. The radius of each cone is 3 cm. If you want to fill the bottom ha

EleoNora [17]

The volume of a cone is V= (1/3)pi r²h
it was given
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6 0

3 years ago

A university researcher wants to estimate the mean number of novels that seniors read during their time in college. An exit surv

lys-0071 [83]

Answer:

Population mean = 7 ± 2.306 × $\frac{2.29}{\sqrt{9} }$

Step-by-step explanation:

Given - A university researcher wants to estimate the mean number

of novels that seniors read during their time in college. An exit

survey was conducted with a random sample of 9 seniors. The

sample mean was 7 novels with standard deviation 2.29 novels.

To find - Assuming that all conditions for conducting inference have

been met, which of the following is a 94.645% confidence

interval for the population mean number of novels read by

all seniors?

Proof -

Given that,

Mean ,x⁻ = 7

Standard deviation, s = 2.29

Size, n = 9

Now,

Degrees of freedom = df

= n - 1

= 9 - 1

= 8

⇒Degrees of freedom = 8

Now,

At 94.645% confidence level

α = 1 - 94.645%

=1 - 0.94645

=0.05355 ≈ 0.05

⇒α = 0.5

Now,

$\frac{\alpha}{2} = \frac{0.05}{2}$

= 0.025

Then,

$t_{\frac{\alpha}{2}, df }$ = 2.306

∴ we get

Population mean = x⁻ ± $t_{\frac{\alpha}{2}, df }$ × $\frac{s}{\sqrt{n} }$

= 7 ± 2.306 × $\frac{2.29}{\sqrt{9} }$

⇒Population mean = 7 ± 2.306 × $\frac{2.29}{\sqrt{9} }$

3 0

3 years ago

Read 2 more answers