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harkovskaia [24]
2 years ago
7

1. Jennifer can mow the lawn in 20 min. Kristen can mow the lawn in 30 min. If they work together, how long will it take them to

mow the lawn
Mathematics
1 answer:
vladimir1956 [14]2 years ago
7 0

Answer:

Sam can do the job in 20 min. So he can do the whole job at the rate of 1 job in 20 minutes.

So he does 1/20 of the job per minute.

.

Rob can do the job in 30 min. His rate is 1/30 of the job per minute.

.

Working together how does it take?

.

1/20*x + 1/30*x = 1 job done

, where x = minutes.

.

Step-by-step explanation:

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What is an equation for the line through (11,-21) with undefined slope​
Andreyy89

Answer:

x=11

Step-by-step explanation:

An undefined slope is a vertical line on a graph. This means it isn't equal to a y-value, but rather an x-value instead. All values of y work for this function, just as long as the x-coordinate is 11.

3 0
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A new test has been developed to detect a particular type of cancer. The test must be evaluated before it is put into use. A med
Troyanec [42]
The tree diagram of the problem above is attached
There are four outcomes of the two events,

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The probability of someone picked at random has cancer given that test result indicates cancer is  \frac{0.0396}{0.0396+0.0096}= \frac{33}{41}

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3 years ago
If 1 16 oz can cost. $1 how much is 8 40oz cans
Studentka2010 [4]

Answer:

8 I think

Step-by-step explanation:

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3 0
3 years ago
Read the following scenario, which is represented by a polynomial expression. Then answer the questions to interpret the parts o
Effectus [21]

Answer:

x is the number of $1 increase in the price.

If there is no increase, then the total money earned is

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If there is $2 increase, then the total money earned is

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If we continue the pattern, for x times $1 increase, total money earned is

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3 years ago
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ivolga24 [154]

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Step-by-step explanation:

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3 years ago
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