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swat32
3 years ago
6

a plumber charges $50 each visit plus $15 per hour. How many hours did the Plumber work if he charged a total of $110? Create an

equation and solve for the number of hours the plumber worked
Mathematics
1 answer:
Vsevolod [243]3 years ago
6 0

So, since the initial fee is $50, and every hour is $15, if h is equal to hour, the equation would be like this:


50 + 15h = 110.


Then, if we want to get the answer, we need to solve the equation.


First we pass the 50 to the other side, like this:


15h = 110 - 50

15h = 60


Then we pass the 15 dividing like this:


h = 60/15

h = 4


And we get four!


So the answer is: 4.


Hope this helped! c:

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Answer:

a. P(X=50)= 0.36

b. P(X≤75) =  0.9

c. P(X>50)=  0.48

d. P(X<100) = 0.9

Step-by-step explanation:

The given data is

x                      25        50       75        100          Total

P(x)                0.16       0.36    0.38    0.10          1.00

Where X is the variable and P(X) = probabililty of that variable.

From the above

a. P(X=50)= 0.36

We add the probabilities of the variable below and equal to 75

b. P(X≤75) = 0.16+ 0.36+ 0.38= 0.9

We find the probability of the variable greater than 50 and add it.

c. P(X>50)= 0.38+0.10=  0.48

It can be calculated in two ways. One is to subtract the probability of 100 from total probability of 1. And the other is to add the probabilities of all the variables less than 100 . Both would give the same answer.

d. P(X<100)= 1- P(X=100)= 1-0.1= 0.9

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3 years ago
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