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Tomtit [17]
3 years ago
12

What is the answer please help

Mathematics
1 answer:
satela [25.4K]3 years ago
7 0

0.9 seconds is the correct answer

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Which of the following is the solution to |-2x-15|≤7
sergeinik [125]

Answer:

Step-by-step explanation:

C. -11<x<-4

|-2x-15|<7 split into possible cases

- 2x - 15 < 7, - 2 x - 15 > 0

-(- 2x - 15 ) <7, -2x - 15 < 0 solve the inequalities

x>-11, x < -15/2

x< -4, x> -15/2 Find the intersections

[ -11, -15/2 ]

-15/2, -4]  Find the union

[-11, -4 ] Simplify

-11<x<-4

5 0
3 years ago
Ming works as a quality assurance analyst at a bottling factory. She wants to use a one-sample z interval to estimate what propo
Nastasia [14]

Answer:

Sample size is n=423

Step-by-step explanation:

Given that,

Margin of error =4%

Confidence level =90%

Suppose, sample proportion=0.5

        i.e. \hat{P}=0.5

We know that,

     Margin of error =2^*\sqrt{\frac{\hat{p}(1-\hat{p})}{n} }

 ∴ 1.64\sqrt{\frac{0.5(0.5)}{n} } \leq 4\%

\Rightarrow 1.64\sqrt{\frac{0.25}{n} } \leq 0.04

\Rightarrow \frac{0.5}{\sqrt{n} } \leq \frac{0.04}{1.64}

\Rightarrow \frac{0.5}{\sqrt{n} } \leq 0.0243

\Rightarrow \sqrt{n}\geq \frac{0.5}{0.0243}

\Rightarrow \sqrt{n}\geq 20.57

squaring on both side,

∴ n=423.1249

Hence, the sample size is,

   n=423

Hence, the correct option is (b).

       

7 0
3 years ago
Austin is 69 years younger than Jamie. 3 years ago, Jamie's age was 4 times Austin's age. How old is Austin now?
matrenka [14]

Answer: 26 years old

Step-by-step explanation:

  1. Create an equation with Austin as x and Jamie as x+69 (I just like workin with addition signs more)= 4(x-3)= x+69-3
  2. Simplify the equations --> 4x-12=x+66
  3. Solve the equation: 3x-12=66 --> 3x=78 --> x=26

This is the same as other age problems, just with the extra step of distributing the multiplication.

4 0
2 years ago
Consider the probability distribution shown below.
rusak2 [61]

Answer:

it is b

Step-by-step explanation:

3 0
2 years ago
7 yr 27 mon 27 da + 26 mo 42 da = i need answer aszap
rosijanka [135]

Answer:

11 years 7 months 7 days(if 31 days a months) and change 7 days to 9 days if assuming 30 days a moths

7 0
2 years ago
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