Michaela paid $690 wholesale for mirrors that cost $933 retail. Calculate the percent decrease in price.
2 answers:
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Answer:
0.4
Step-by-step explanation:
To calculate the probability that a maintenance operation will take more than 2 hours and 15 minutes. We can first calculate the probability that ALL maintenance operation on 70 of the units will take less than 2 hours and 15 minutes, then subtract it from 1.
So the probability of a maintenance operation that would take less than 2 hours and 15 minutes, or 135 minutes is:
So the probability that a maintenance operation will take more than 2 hours and 15 minutes is:
Answer:
Step-by-step explanation:
Let:
We need to eliminate one of the variables, so let's use elimination method. First multiply (1) by 4 and (2) by 3:
Now subtract 3*(2) from 4*(1) in order to eliminate x:
Solving for y:
Multiplying both sides by -1/13
Finally, replacing the value of y in (1)
Solving for x:
add 2 to both sides:
Multiply both sides by 1/3: