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german
3 years ago
9

David charges $4 to wash all the windows of a car, inside and out. The amount of money he earns washing the windows must end in

one of what digits? Why? List all the possible digits.
Mathematics
1 answer:
nordsb [41]3 years ago
4 0

Answer:

The possible digits are : 0, 2, 6, 4, 8

Step-by-step explanation:

Money charged by David to wash the windows of a car = $4

Let total number of cars he washed be x

Now, Total money earned by washing windows of a car = Money charged for washing all windows of one car × Total number of cars washed

⇒ Total money earned = 4 × x

So, the amount will always end in the digits which comes at the end of multiples of 4 because the amount will be always in the multiples of 4

⇒ 4 × 1 = 4 , 4 × 2 = 8 , 4 × 3 = 12 , 4 × 4 = 16 , 4 × 5 = 20 ......

So, the possible digits are : 0, 2, 6, 4, 8

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Claire had 4 1/6 feet of string. She used some string to hang out decorations. Now she has 1 5/6 feet of string left. How much s
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Answer:

Length of string used by Claire = 7 / 3 feet

Step-by-step explanation:

Given:

Length of string Claire in starts = 4\frac{1}{6} feet

Length of string Claire in end = 1\frac{5}{6} feet

Find:

Length of string used by Claire

Computation:

Length of string Claire in starts = 4\frac{1}{6} feet = 25 / 6 feet

Length of string Claire in end = 1\frac{5}{6} feet = 11 / 6 feet

Length of string used by Claire = Length of string Claire in starts - Length of string Claire in end

Length of string used by Claire = [25 / 6] - [11 / 6]

BY taking LCM

Length of string used by Claire = [25 - 11] / 6

Length of string used by Claire = 14 / 6

Length of string used by Claire = 7 / 3 feet

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2 years ago
A line has a rise of 3 and a run of 12. find the slope of the line. type a numerical answer in the space provided. if necessary,
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3 years ago
Would you rather save 25% off or save one third?
Trava [24]

Answer:

One-third

Step-by-step explanation:

One-third (which is about 33.3%) is greater than 25%

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3 years ago
I NEED HELP!!!
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Answer:

<h2>B. The amount of fuel used was lowest at speeds around 60km/h.</h2>

Step-by-step explanation:

The decreasing part is from (20,13) to (60,6), which gives an average rate of

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Then, we have an increasing part from (60,6) to (120,10), which gives an average rate of

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Basically, at 60 km/h the fuel used was 6 liters per 100 kilometers. Notice that the other velocities make the car to use more liters per kilometers.

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