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3 years ago

Solve the inequality by adding. x – 7 > –11

Mathematics

1 answer:

victus00 [196]3 years ago

6 0

I hope this helps you

x-7+7> -11+7

x> -4

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The American Academy of Periodontology released a survey, revealing that 27% of US adults admit they lie to their dentist about

Y_Kistochka [10]

Answer:

A: H0: p = 0.27; Ha: p > 0.27

Step-by-step explanation:

The parameter is the population proportion.

According to the survey conducted by the American Academy of Periodontology, the proportion of of US adults who admit they lie to their dentist about how often they floss their teeth is 27%.

This means the null hypothesis is :

$H_0: p=0.27$

Periodontist Dr. Garcia believes that the percentage seems low, so his claim is that the percentage should be more than 27%.

This means, the alternate hypothesis is

$H_{a}:p \: > \: 0.27$

Therefore the correct choice is A.

5 0

4 years ago

I don’t understand how to do this

schepotkina [342]

Answer:

The solution is $x =0.$

Step-by-step explanation:

The equation

$\bold{(1).}\: sin(\dfrac{3\pi }{2} +x)+sin(\dfrac{3\pi }{2} +x) =-2$

can be rewritten as

$2* sin(\dfrac{3\pi }{2} +2) =-2$

and can be further simplified to

$sin(\dfrac{3\pi }{2}+x ) =-1$ .

Now, taking the inverse sine of both sides we get:

$sin^{-1}(sin(\dfrac{3\pi }{2} +x) =sin^{-1}(-1)$

$\bold{(2).}\: \dfrac{3\pi }{2} +2 =sin^{-1}(-1)$

The value of the right side on the interval $[0,2\pi)$ is

$sin^{-1}(-1) = \dfrac{3\pi}{2} \: \:( \text{or }270^o)$ ,

which makes the equation (2)

$\dfrac{3\pi }{2}+x =\dfrac{3\pi}{2}$

solving for $x$ gives

$\boxed{x = 0}$

which is our solution.

4 0

3 years ago

Tom begins his morning shift at 9:45

Murrr4er [49]

9:45 plus 3 hours goes to 12:45 pm. add 45 minutes you get 1:30PM as your answet

6 0

4 years ago

Which expression represents this word phrase? five more than the product of x and 6

disa [49]

Answer:

The expression is: 6x + 5

Explanation:

Product means multiplication

Therefore, the product of x and 6 means that we will multiply x by 6

This would give us: 6x

Now, five more than the product means that we will add 5 to the product we just obtained

This means that:

five more than the product of x and 6 is:

6x + 5

Hope this helps :)

3 0

4 years ago

Which of the following is not an expression

7nadin3 [17]

Correct me if I’m wrong but I believe it is C

4 0

3 years ago

Read 2 more answers