Complete question :
At Alan's auto shop, it takes him 9 minutes to do an oil change and 12 minutes to do a tire change. Let x be the number of oil changes he does. Let y be the number of tire changes he does. Using the values and variables given, write an inequality describing how many oil changes and tire changes Alan can do in less than an hour ( minutes).
Answer:
9x + 12y < 120
Step-by-step explanation:
Given that:
Time taken for oil change = 9 minutes
Time taken for tire change = 12 minutes
x = number of oil changes ; y = number of tire changes
Total hours = 1 hour = 60 minutes
Number of oil and Tyre changes possible in less than an hour
(Number of oil changes * time taken) + (number of tire changes * time taken) less than 60 minutes
9x + 12y < 120
Answer:
9.9x + 16.1
Step-by-step explanation:
SImplify using like terms
Simplify:
- 3.2x + 7.9 + 8.2 + 6.7x
- 3.2x + 6.7x + 7.9 + 8.2
- 9.9x + 16.1
-Chetan K
Answer:
Z=11.0
Step-by-step explanation:
Let Caucasian individuals be the population 1 and African American be the population 2. So, we are given that
n=150
n1=75
mean1=xbar1=6.1.
standard deviation1=S.D1=σ1=1.1.
Variance1=V(x1)=σ1²=1.1²=1.21.
n2=75.
mean2=xbar2=4.3.
standard deviation2=S.D2=σ2=0.9.
Variance2=V(x2)=σ2²=0.9²=0.81.
The z-statistic is
Z=10.97
Z=11.0
So, the z value obtained while calculating the test statistic is approximately 11.0.
20in flat -> 2 sides of 10in at 90degrees from eachother
area would be 10*10/2 =50in^2
Answer:
3 hours
Step-by-step explanation:
Angel's remaining distance is ...
280 mi - 70 mi = 210 mi
At 70 miles per hour, it will take ...
(210 mi)/(70 mi/h) = 3 h
to cover the remaining distance.
_____
The appropriate relationship is ...
time = distance/speed
