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Natali [406]
2 years ago
6

Tim has a box of 15 markers. He gives 3 markers each to 4 friends. What expression can show the number of markers Tim has left?

Mathematics
2 answers:
Nina [5.8K]2 years ago
7 0
15-(4x3) =3 , idk how to explain it but the answers 3 for sure
KiRa [710]2 years ago
7 0

Answer:

15-4(3)

Step-by-step explanation:

We are given that

Number of markers in a box =15

Total number of friends=4

Number of markers are  given to each friend=3

We have to find the expression that can show the number of markers Tim has left.

To find the number of markers Tim has left we will subtract the number of markers given to 4 friends from total number of markers  in a box

Number of markers are  given to 4 friend=4\times 3

Number of markers Tim has left=15-4(3)

Hence, the expression which cans how the number of markers Tim has left

15-4(3)

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Answer:

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Explanation:

<u>1) Write the changes in the temperature of the city over the 4 days in an easy way to read.</u>

<u />

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<u>2) Write the expression to show the average daily change in temperature.</u>

The average of a set of data is calculated with the expression:

  • Average = (sum of the data) / amount of data

Hence, you need to add the four change of temperature data and divide by 4.

The expression is:

  • Average =  [ 1.34 °C + (- 5 / 7 °C) + ( - 0.75 °C) + 4/9 ° C ] / 4

<u>3) Write the steps to solve the expression:</u>

You can choose between adding  fractions or adding the decimal forms of the numbers.

If you choose adding decimals, keep the complete decimals in your calculator, to avoid the accumulation of errors due to rounding. Round only the final result.

These are the steps.

<u>a. Find the decimal forms of the fractions:</u>

  • - 5/7  ≈ 0.71428
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<u>b. Add the four data:</u>

  • 1.34°C + (- 0.71428 °C) + (-0.75 °C) + 0.44444 °C ≈ 0.32019 °C

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<u>c. Divide the sum by the number of data (4)</u>

  • 0.32019 °C / 4 ≈ 0.080004 °C

<u>4. Round to the nearest hundredth</u>

The place of the hundreth is the second after the decimal point, which is 8 in this case:

  • 0.080004 °C ≈ 0.08 °C

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