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Alexandra [31]
1 year ago
8

Ling lives 2 miles from school. It took him 15 minutes to bike from school to home. The first half of the distance he biked at a

speed of 12 mph. What was his speed for the remaining distance? What was his average speed?
Mathematics
2 answers:
kodGreya [7K]1 year ago
8 0
He was going 6 mph for the remaining distance 
the average is 9
lisov135 [29]1 year ago
5 0
1 mile at 12 m/h is .2 m/min
1 mile at .2 m/min (1/.2) = 5 min So the first mile took 5 minutes
To find how fast the second mile was:
You know it was 1 mile and it took 10 minutes
1/10=.1 m/min which is 6 m/h
The average speed is 6+12/2=9 m/h

Hope that helps.  Feel free to ask any questions.
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In a reliability test there is a 42% probability that a computer chip survives more than 500 temperature cycles. If a computer c
Strike441 [17]

Answer:

The probability is P(B' n A ' ) =  16%

Step-by-step explanation:

From the  question we are told that  

     A  is the event that  the chip was "made by company A"

      B is  the event that a chip "survives 500 temperature cycles"

    The probability that a computer chip survives more than 500 temperature cycles is

     P(B) = 42% = 0.42

 The  probability that does not survive more than 500 temperature cycles and  it was manufactured by company A is  P(A | B' ) =  0.73

The probability that the  computer chip is not manufactured by company A and does not survive more than 500 temperature cycles is mathematically evaluated as

      P(B' n A ' ) =  P (B' | A' ) P(B ')

Where B' \ and \   A' are a A and B complements and  | represented AND operator  

  So  

        P(B' n A ' ) = [1 -  P (B' | A )] [1 - P(B )]

substituting values

         P(B' n A ' ) = [1 -  0.73] [1 - 0.42 ]

        P(B' n A ' ) = (0.27 )(0.58)

        P(B' n A ' ) =0.16

        P(B' n A ' ) =  16%

7 0
1 year ago
Which cube root function is always decreasing as x increases?
Aleks04 [339]

We know

y=\sqrt[3]{x}

is an increasing function as when the value of x increases the value of y increases

And when the value of x decreases , the value of y also decreases.

Now if we have (x+a) or (x-a) instead of x, the function shall have a horizontal shift.

So it shall either move left or right but shall not flip.

So

y=\sqrt[3]{(x-8)} and y=\sqrt[3]{(x-5)}

are increasing functions.

Only when x becomes -x, that the function shall flip & shall become a decreasing function.

But then it must be - (x-a) or -(x+a) inside.

So

y=\sqrt[3]{-(5-x)} is also increasing

Only

y=- \sqrt[3]{(x+5)}

is a decreasing function.

Option D) is the right answer.

6 0
2 years ago
Read 2 more answers
An inspector checks 98 cell phones and finds 2 of them not working. If a company
insens350 [35]

Answer:

17

Step-by-step explanation:

Use ratio method

98:2

850:x

so, x = (850 x 2) divided by 98 = 17.3469388

Round it to nearest whole number = 17

8 0
1 year ago
What would be Kelly’s weight be in newtons if her mass is 70 kilograms?
notsponge [240]
A. 70 × g
B. 70/g
C. 70/g2
D. 70 × g2
E. 70

answer= A
4 0
1 year ago
Pada suatu deret geometri diketahui suku ke-3 = 18 dan suku ke-6 = 486. suku pertama pada deret tersebut adalah...
Digiron [165]
A . r^(3-1) = 18
a . r^2 = 18...... (i)

a . r^(6-1) = 486
a . r^5 = 486 ...... (ii)

dengan membuat perbandingan dari kedua persamaan diperoleh:
r^2/r^5 = 18/486
1/r^3 = 1/27 
r^3 = 27
r = akar pangkat 3 dari 27 
r = 3

dari persamaan <span>a . r^2 = 18...... (i)
                          a . 3^2 = 18
                          a . 9 = 18
                          a      = 18/9 = 2</span>
3 0
1 year ago
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