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Dvinal [7]
3 years ago
15

The equation y = 38x + 50 models the data on a plumber's scatter plot, where x is the number of hours the plumber works, and y i

s the total bill in dollars. If Sal pays the plumber $126, how many hours did the plumber work?
1 hour
1.75 hours
2 hours
2.5 hours
Mathematics
2 answers:
sergejj [24]3 years ago
7 0

Answer:

2 hours

Step-by-step explanation:

I substituted y for 126 and solved like so:

126 = 38x + 50

126 - 38x = 50

(126-126) - 38x = 50 - 126

-38x = -76

-38x/-38 = -76/-38

X = 2

There ya go! Hope this helps, good luck :)

Phoenix [80]3 years ago
4 0
The answer would be 2 hours,
y being the total ($126) so you would plug in 126 for y and solving the equation.
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4 years ago
Andrea and Ashley are middle distance runner's for the schools traffic and FaceTime in the 500 m race are approximately normally
swat32

Answer:

0.006 is the probability that the record will be broken in next year.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 62 seconds

Standard Deviation, σ = 0.8 seconds

We are given that the distribution of face time is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

The record will be broken if the time is less than 60 seconds.

P(time is less than 60 seconds)

P(x < 60)

P( x < 60) = P( z < \displaystyle\frac{60 - 62}{0.8}) = P(z < -2.5)

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P(x < 60) =0.006 = 0.6\%

Thus, 0.006 is the probability that the record will be broken in next year.

6 0
3 years ago
How many solutions does the following system have?
Allisa [31]
No solution since the two equations do not intersect

7 0
3 years ago
A circuit of voltage V volts and resistance R
enot [183]

Answer:a) 3 amp

b) 3 volts

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As the relationship is given by

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b)

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8 0
4 years ago
Help me please I will mark 5 stars please it is urgent
Effectus [21]

Answer:

a) 3sec

b) highest point of 50

c) at 0 by 8 sec

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