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meriva
3 years ago
8

The number of students at a school decreased 20% from 2010 to 2011. If the number of

Mathematics
1 answer:
sladkih [1.3K]3 years ago
8 0

Answer:

C

Step-by-step explanation:

Okay, here we have a reduction in the number of students by 20% from 2010 to 2011.

In 2011, we had k students, so we want to calculate the number of students we had in 2010.

Let the number of students present in 2010 be x

So mathematically;

x - 20% of x = k

x - 0.2(x) = k

0.8x = k

x = k/0.8

x = k * 1/0.8

x = k * 1.25

x = 1.25k

lolultyl
2 years ago
why did you divide it by 1?
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Me need big brain to answer this question c:
Ganezh [65]

Answer:

y=\dfrac{3}{2}x\ ...(i)\\\\ z=\dfrac{5}{2}x\ ...(ii)\\\\ z=x+y\ ....(iii)

Step-by-step explanation:

Let x be the amount of dough required for small pizza, y be the amount of dough required for medium pizza and z be the amount of dough required for large pizza.

As per the question , we have

y=\dfrac{3}{2}x\ ...(i)\\\\ z=\dfrac{5}{2}x\ ...(ii)\\\\ z=x+y\ ....(iii)

Hence, the equation for the question with the variable representing the amount of dough needed for small pizza.

y=\dfrac{3}{2}x\ ...(i)\\\\ z=\dfrac{5}{2}x\ ...(ii)\\\\ z=x+y\ ....(iii)

3 0
3 years ago
Give the correct model for the situation.
galina1969 [7]

Answer:

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5 0
3 years ago
Read 2 more answers
Help i only have 2 more questions and im done with this quiz
kvv77 [185]

{d}^{2}  \div (4c) - b + 5a \\  =  {(8)}^{2}  \div( 4 \times 2) - 3 + 5 \times  \frac{1}{5}  \\  = 64  \div 8 - 3 + 1 \\  = 8 - 3 + 1 \\  = 9- 3 \\  = 6

<u>Answer</u><u>:</u>

6

Hope you could understand.

If you have any query, feel free to ask.

6 0
3 years ago
George charged a motorized bicycle on his credit card for $2,000 on June 12. His balance before that purchase on that credit car
Gnesinka [82]
The calculation uses the accumulated daily balance method (ADB).
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3 0
4 years ago
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ser-zykov [4K]

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