4 years ago

Solve for x: x = 22.53045

Mathematics

1 answer:

Diano4ka-milaya [45]4 years ago

6 0

The answer is 22.5

Step by step explanation:

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rewona [7]

The correct answer is Option A.

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3 years ago

The cost of 10 oranges is 1 dollar what is the cost of 5 dozen oranges ?

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3 years ago

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What is a variableexpression

Anastaziya [24]

A combination of terms and mathematical operations that contains at least one variable.

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4 years ago

X+2y=6<br> 2x+4y=12<br><br> I need to use substitution to solve, may anybody help?

lana66690 [7]

$x + 2y = 6$

$x = - 2y + 6$
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then find y and plug that y value into one of the original equations to find x

Hope this helps!

7 0

3 years ago

The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly selected parts. The sample standard

luda_lava [24]

Answer: $0.3849$

Step-by-step explanation:

Given : sample size : n= 51

sample standard deviation : s= 0.46

Significance level : $\alpha=1-0.95=0.05$

Using chi-square distribution, the critical values will be :

$\chi^2_{\alpha/2, n-1}=\chi_{0.025,\ 50}=71.4202$

$\chi^2_{1-\alpha/2, n-1}=\chi_{0.975,\ 50}=32.3574$

Confidence interval for population standard deviation ( $\sigma$ ) :

$\sqrt{\dfrac{s^2(n-1)}{\chi^2_{\alpha/2}}}$

Substitute all the values , we get

$\sqrt{\dfrac{(0.46)^2(50)}{71.4202}}$

Hence, the 95% two-sided confidence interval for σ : $0.3849$

8 0

3 years ago