Linda worked 20 hours and earned $215.At this rate, how much would she earn if she worked 24 hours ?
2 answers:
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Answer:
22.67 containers.
Step-by-step explanation:
The number of cars washed is the average by the total hours worked:
Given that each car uses 1/3 tin of wax, the total containers is calculated as:
Hence, the car wash uses 22.67 containers of wax per day.
The average time of the 20 athletes who did not qualify for the final is 11.2 seconds .
<u>Step-by-step explanation:</u>
Here we have , Twenty-eight athletes participate in a 100-meter race. The time of each athlete is measured during the qualification round. The average time is 11 seconds. The 8 athletes with the fastest time qualified for the final. The average time of these 8 athletes is 10.5 seconds. Let's have equations for this:
where
are athletes
⇒
⇒
⇒
⇒ , where m is average time of the 20 athletes who did not qualify for the final.
⇒
⇒
⇒
∴ The average time of the 20 athletes who did not qualify for the final is 11.2 seconds .
Answer:
Correct choice is (C). .
Step-by-step explanation:
Given expression is .
Now we need to simplify that then select the correct difference value from the given choices.
negative times negative is positive
Combine like terms because variable z has same exponent.
Hence correct choice is (C). .