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katrin [286]
2 years ago
12

Please answer this as soon as you can >.

Mathematics
1 answer:
kkurt [141]2 years ago
5 0

Answer:

Step-by-step explanation:

i would help plz help me i need help onaly 7

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The average weight of the class of 35 students was 45 KG. with the admission of a new student the average weight came down to 44
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The weight of the new student is 27 kg.

Average weight

= total weight ÷total number of students

<h3>1) Define variables</h3>

Let the total weight of the 35 students be y kg and the weight of the new student be x kg.

<h3>2) Find the total weight of the 35 students</h3>

<u>45 =  \frac{y}{35}</u>

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<h3>3) Write an expression for average weight of students after the addition of the new student</h3>

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= 35 +1

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Total weight

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<h3>4) Substitute the value of y</h3>

44.5 =  \frac{1575 + x}{36}

<h3>5) Solve for x</h3>

36(44.5)= 1575 +x

1602= x +1575

<em>Subtract 1575 from both sides:</em>

x= 1602 -1575

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Thus, the weight of the new student is 27 kg.

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