So pretend weekend calls is x and weekday calls are y.
the formulas is x + y = 610
0.07x + 0.08y = 48.05
So, x = 610 - y
Then, substitute x into the second equation.
0.07(610 - y) + 0.08y = 48.05
42.7 - 0.07y + 0.08y = 48.05
0.01y = 5.35
y = 535
Then substitute y into the first equation.
x + 535 = 610
x = 75
Just to be sure, substitute x and y into the second equation.
0.07(75) + 0.08(535) = 48.05
5.25 + 42.80 = 48.05
48.05 = 48.05
So, on weekends, he used 75 minutes.
On weekdays, he used 535 minutes.
Answer:
$25 per month
Step-by-step explanation:
What we know:
3 months of a gym membership costs $75.
6 months cost $150.
To find the unit rate, divided 75 by 3, or 150 by 6.
150/6 = 75/3 = 25/1 = $25 per month
Answer:
10, 13, 3, 12, 2.
Step-by-step explanation:
The numbers are written down alphabetically as they are spelled. For example 6 would be S, 10 would T, 3 would also be T and etc.
The annual salaries at a particular company are approximately normally distributed with a mean is 0.42124
Manufacturing job :
Mean (m) = 40,000
Standard deviation (s) = 9000
Sales job :
Mean (m) = 35000
Standard deviation (s) = 9000
Probability of earning more than 45000 if one or the other job is selected;
Obtaining the standardized scores and probability for each :
Z = (x - m) / s
P(x > 45000)
Z = (45000 - 40000) / 9000 = 0.5555
= 0.56
P(Z > 0.56) = 0.28774(Z probability calculator)
For sales
P(x > 45000)
Z = (45000 - 35000) / 9000 = 1.1111111
= 1.11
P(Z > 1.11) = 0.1335 (Z probability calculator)
0.28774 + 0.1335 = 0.42124
To learn more about Mean Visit : brainly.com/question/19671961
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Answer:
200
Step-by-step explanation:
i'm not sure about it, try it i guess
