4 years ago

Can someone help me with my math ?

1 answer:

3 0

Easy! Just substitute.

That will be 3 + 8 * 4

Remember PEMDAS? Multiplication comes before addition, so FIRT MULTIPLY.

3+ 32= 35
Final answer= 35

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Solve for x -3x = -15 A) x = -45 B) x = 5 C) x = -5

Zina [86]

C-x=-5

Step-by-step explanation:

-3x=-15

or,-3x x =-15

or, x=-15÷3

therefore, x=-5

6 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

Lauren wants to keep her cell phone bill under $60 per month. Her current cell phone plan is $30 per month plus $0.05 per text.

tigry1 [53]

30+0.05t<60
This would be your inequality

4 0

4 years ago

Passes through the points (-2, 1) and (2, 3)

Burka [1]

Answer:

slope 1/2

Step-by-step explanation:

6 0

3 years ago

The measure of one angle of a right triangle is 38∘ more than the measure of the smallest angle. Find the measures of all three

Semmy [17]

Answer:

Step-by-step explanation:

the smallest angle

6 0

4 years ago