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Harlamova29_29 [7]
3 years ago
7

Can somebody help me with B. And C. Please

Mathematics
1 answer:
Crank3 years ago
6 0

Answer:

B) $150 for 15 hours

C) 25 hours

Step-by-step explanation:

B) (15, 150)

C) (25, 250)

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In a study conducted in the United Kingdom about sleeping positions, 1000 adults in the UK were asked their starting position wh
Lady_Fox [76]

Answer: = ( 0.411, 0.409)

Therefore at 95% confidence interval (a,b) = (0.411, 0.409)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean gain x = 0.41

Standard deviation r = 0.016

Number of samples n = 1000

Confidence interval = 95%

z(at 95% confidence) = 1.96

Substituting the values we have;

0.41+/-1.96(0.016/√1000)

0.41+/-1.96(0.000506)

0.41+/-0.00099

0.41+/-0.001

= ( 0.411, 0.409)

Therefore at 95% confidence interval (a,b) = (0.411, 0.409)

4 0
4 years ago
Q6. A triangle has base 9 cm and perpendicular height 5.6 cm. Work out
Leto [7]

Answer:

I got 25.6cm² but I could be wrong

4 0
3 years ago
What is the inverse of the given relation y = 4x - 8
Ronch [10]

To find the inverse of any function, switch the x's with y's and vice versa.


The current equation given is y=4x-8

Switch the y with x and switch the x with y


After doing so, we'll have the following equation:

x=4y-8


Now, let's move the variables around so that y is isolated on the left side again.


Subtract both sides by 4y


x-4y=-8


Subtract both sides by x


-4y=-8-x


Divide both sides by -4


y= \dfrac{x}{4}+2


That is the answer.

Have an awesome day!

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8 0
3 years ago
Read 2 more answers
543,982 rounded to the nearest hundred thousand
Bezzdna [24]

Hello! :)

543,982 rounded to the nearest hundred thousand would be 500,000. Because the digit 4 is less than 5, it would be 600,000. If the digit where the 4 is was 5 or more, it would round to 600,000,

543,982 to the nearest hundred is 500,000.

Hope this helped you!

THEDIPER

3 0
4 years ago
Read 2 more answers
-1/2x+1=1 1/2x+17/2<br> I NEED HELP ON THIS PLEASE HELP<br><br> THANK YOU, SO, MUCH.
Pani-rosa [81]

Answer:

 x = -5/4 = -1.250

Step-by-step explanation:

Step  1  :

           17

Simplify   ——

           2  

Equation at the end of step  1  :

      1          11    17

 ((0-(—•x))+1)-((——•x)+——)  = 0  

      2          2     2  

Step  2  :

           11

Simplify   ——

           2  

Equation at the end of step  2  :

      1          11    17

 ((0-(—•x))+1)-((——•x)+——)  = 0  

      2          2     2  

Step  3  :

Adding fractions which have a common denominator :

3.1       Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

11x + 17     11x + 17

————————  =  ————————

   2            2    

Equation at the end of step  3  :

         1                (11x + 17)

 ((0 -  (— • x)) +  1) -  ——————————  = 0  

         2                    2      

Step  4  :

           1

Simplify   —

           2

Equation at the end of step  4  :

         1                (11x + 17)

 ((0 -  (— • x)) +  1) -  ——————————  = 0  

         2                    2      

Step  5  :

Rewriting the whole as an Equivalent Fraction :

5.1   Adding a whole to a fraction

Rewrite the whole as a fraction using  2  as the denominator :

        1     1 • 2

   1 =  —  =  —————

        1       2  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

5.2       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

-x + 2     2 - x

——————  =  —————

  2          2  

Equation at the end of step  5  :

 (2 - x)    (11x + 17)

 ——————— -  ——————————  = 0  

    2           2      

Step  6  :

Adding fractions which have a common denominator :

6.1       Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

(2-x) - ((11x+17))     -12x - 15

——————————————————  =  —————————

        2                  2    

Step  7  :

Pulling out like terms :

7.1     Pull out like factors :

  -12x - 15  =   -3 • (4x + 5)  

Equation at the end of step  7  :

 -3 • (4x + 5)

 —————————————  = 0  

       2      

Step  8  :

When a fraction equals zero :

8.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 -3•(4x+5)

 ————————— • 2 = 0 • 2

     2    

Now, on the left hand side, the  2  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  -3  •  (4x+5)  = 0

Equations which are never true :

8.2      Solve :    -3   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

8.3      Solve  :    4x+5 = 0  

Subtract  5  from both sides of the equation :  

                     4x = -5

Divide both sides of the equation by 4:

                    x = -5/4 = -1.250

3 0
4 years ago
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