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NeTakaya
3 years ago
9

Jerry can detail a car by himself in 50 minutes. sally does the same job in 1 hour. how long will it take them to detail a car w

orking together?
Mathematics
1 answer:
siniylev [52]3 years ago
8 0
<u>Jerry:</u>

50 mins = 1 detailed car

1 min = 1/50 of the details

<u>Sally:</u>

60 mins = 1 detailed car

1 min = 1/60 of the details

<u>If they work together:</u>

1 min = 1/50 + 1/60 = 11/300 of the details

Total time needed:

300 ÷ 11 = 27.27 mins

Answer: They will need 27.27 mins if they worked together.
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iren2701 [21]
For question 1:
1% = 120 ÷ 100 = 1.2
15% = 1.2 × 15 = 18
So, 15% of 120 is 18

For question 2:
68.4 ÷ 72 = 0.95
0.95 × 100 = 95%
So, the percentage is 95%

For question 3,
1% = 12.5 ÷ 8 = 1.5625
100% = 1.5625 × 100 = 156.25
So, 8% of 12.5 is 156.25.

For question 4,
1% = 48 ÷ 40 = 1.2
100% = 1.2 × 100 = 120
So, 40% of 48 is 120.

For question 5,
1% = 195 ÷ 100 = 1.95
62.5% = 1.95 × 62.5 = 121.875
So, 62.5% of 195 is 121.875
8 0
3 years ago
-4.3 + x equals 0 selected place on the number line to positive value of x​
Zanzabum

Answer:

x is equal to 4.3

Step-by-step explanation:

since it's -4.3 + x is equal to 0

you take -4.3 to the other side of the equal sign which makes it positive and x is equal to 4.3

6 0
3 years ago
Find two numbers if their sum is 115 and their difference is 7
kobusy [5.1K]

Answer:

54+61

Step-by-step explanation:

54 + 61 = 115

61 - 54 = 7

4 0
3 years ago
(-2,-7) and (7,-7) <br> What slope
Zarrin [17]

Answer:

Step-by-step explanation:

In order to find the slope, subtract -7 and -7, which is -7-(-7)=-7+7=0

Then subtract 7 and -2, which is 7-(-2) = 7+2=9

Divide 0 and 9 which equals 0

the slope is 0

3 0
3 years ago
Read 2 more answers
Please help me! i need help
Andrej [43]

Answer:

20%

Step-by-step explanation:

400/2000=0.2

0.2*100=20

7 0
3 years ago
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