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3 years ago

Find the solutions to the equation below. Check all that apply.

Mathematics

2 answers:

PSYCHO15rus [73]3 years ago

6 0

The answer is E and F

lubasha [3.4K]3 years ago

5 0

2x^2 + 9x + 4 = 0

x^2 + 9/2*x + 2 = 0

x = - 9/4 +- √(81/16 - 32/16) = - 9/4 +- 7/4

x1 = - 1/2

x2 = - 4

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Ali finished his history assignment in 1/4

Juli2301 [7.4K]

$\frac{1}{4} \times 3 = \frac{3}{12} \frac{2}{3} \times 4 = \frac{8}{12} \\ \frac{3}{12} + \frac{8}{12} = \frac{11}{12}$

5 0

3 years ago

What is the solution to this equation? <br> log_7 (5 + 11x) = 2

11111nata11111 [884]

Answer:

x = 4

Step-by-step explanation:

Using the rule of logarithms

$log_{b}$ x = n , then x = $b^{n}$

Given

$log_{7}$ (5 + 11x) = 2 , then

5 + 11x = 7² = 49 ( subtract 5 from both sides )

11x = 44 ( divide both sides by 11 )

x = 4

5 0

1 year ago

Please help will give Brianliest!!!

marshall27 [118]

Answer: y=2(x-3)-5

I hope this is good enough:

8 0

2 years ago

9 is 25% of what number??

AlexFokin [52]

So because 25%=1/4 we would know to multiply 9*4
Which would get our answer to be 36 :)

6 0

3 years ago

Read 2 more answers

"A laboratory tested 73 chicken eggs and found that the mean amount of cholesterol was 230 milligrams with LaTeX: \sigmaσ = 17.4

Scrat [10]

Answer:

The 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is between 226.01 and 233.99 milligrams.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{17.4}{\sqrt{73}} = 3.99$

The lower end of the interval is the sample mean subtracted by M. So it is 230 - 3.99 = 226.01

The upper end of the interval is the sample mean added to M. So it is 230 + 3.99 = 233.99.

The 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is between 226.01 and 233.99 milligrams.

4 0

2 years ago