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AysviL
3 months ago
5

A gardener can care for the Green's property in 5 hours. If his helper assists him, they can complete the job in 4 hours. How lo

ng will it take the helper to do the job?
Mathematics
1 answer:
babunello [11.8K]3 months ago
6 0

Detailed explanation:

Work completed by Gardner each hour = 1 / 5

Combined work done by Gardner and assistant each hour = 1 / 4

Work done by the helper per hour

= 1 / 4 - 1 / 5

= 1 / 20

Time required for helper to finish the job:

= 20 hours

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Jean lives about 10 miles from the college where she plans to attend a 10-week summer class. There are two main routes she can t
PIT_PIT [12445]

Answer:

We would recommend the Country Route as its travel time is consistently estimated between 15 and 18 minutes.

Step-by-step explanation:

Jean lives approximately 10 miles away from the college where she plans to attend a summer class lasting ten weeks. She has two primary routes available, one that traverses the city and another that goes through the countryside.

Jean has set up a randomized trial in which she flips a coin each day to determine her travel route, collecting data from five days for both.

Country Route - 17, 15, 17, 16, 18 (in minutes)

City Route - 18, 13, 20, 10, 16 (in minutes)

Next, we need to evaluate which route is superior for Jean.

The data indicates that the Country route has timing ranging from 15 to 18 minutes, suggesting she will typically arrive within this timeframe.

Conversely, the City route timings show significant variation with a minimum of 10 minutes and a maximum of 20 minutes, indicating uncertainty regarding her arrival time.

Hence, it is advisable for her to select the Country route.

7 0
2 months ago
A camera is selling for $7.50 off the regular price. It was marked down 15%. A student used the equation:
lawyer [12517]

Answer:

The student should have divided the amount after the discount by the percentage expressed as a decimal.

Step-by-step explanation:

4 0
3 months ago
Read 2 more answers
Alice purchased 4 1⁄2 kilograms of olive oil for $27. What is the price per kilogram?
Leona [12618]
To tackle this, we can utilize ratios. For instance, 4 1/2 kg of olive oil costs $27. Therefore, the price for 1 kg of olive oil can be represented as follows: x = (27 * 1) / 4.5 which simplifies to x = 27/4.5. This calculation results in a cost of $6 per kilogram. Hope this is of assistance!
8 0
2 months ago
Based on the graph shown to the right, whose phones cost varies directly with the amount of time spent talking?
Inessa [12570]

Answer:

B

Step-by-step explanation:

If two quantities have a direct variation, their graph will originate from the point of intersection at the origin.

Among all graphs, only Nikiya's intersects the origin, thus the answer is B.



8 0
3 months ago
Read 2 more answers
Identify the equation of the circle that has its center at (-27, 120) and passes through the origin.
zzz [12365]

The equation representing the circle centered at (-27, 120) that passes through the origin is:

(x + 27)^2 + (y - 120)^2 = 15129

Solution:

The general equation of a circle is expressed as:

(x-a)^2+(y-b)^2=r^2

Where,

(a, b) denotes the center of the circle

r signifies the radius

Given the center as (-27, 120)

Thus;

a = -27

b = 120

Considering it intersects the origin, meaning (x, y) = (0, 0)

Substituting (a, b) = (-27, 120) and (x, y) = (0, 0) into the equation

(0 + 27)^2 + (0 - 120)^2 = r^2\\\\729 + 14400 = r^2\\\\r^2 = 15129

Input r^2 = 15129 and (a, b) = (-27, 120) into the equation

(x + 27)^2 + (y - 120)^2 = 15129

Hence, the equation characterizing the circle is determined

6 0
3 months ago
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