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3 years ago

How can 2x2 = x2 + 4x + 8 be set up as a system of equations?

Mathematics

1 answer:

larisa [96]3 years ago

8 0

I would say that y=x2+4x+8 simply because it matches what the original equation

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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

Julius has three times as many stamps in his collection as his freinds liam and mario combined. Liam has 10 stamps in his collec

UNO [17]

Answer:

Mario has 19 stickers.

5 0

3 years ago

Need the answer in 20 min !! Ty

kirill115 [55]

Answer:

Step-by-step explanation:

6 0

3 years ago

The sum of two numbers is 52, and the difference between the numbers is 2. Find the numbers.

geniusboy [140]

The difference between them is 2, so let the unknown numbers be x and (x+2).

Their sum is 52, so: 
52 = x + (x+2) 
52 = x + x + 2 
50 = x + x 
50 = 2x 
25 = x 

So your unknown numbers x and (x+2) are 25 and 27.

4 0

4 years ago

What is 2x to the second power times x to the second power

ValentinkaMS [17]

$\bf 2x^2\cdot x^2\implies 2x^{2+2}\implies 2x^4$

5 0

4 years ago