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3 years ago

Please help thank you

Mathematics

1 answer:

lubasha [3.4K]3 years ago

8 0

Answer:

The x-intercept is a point on the x-axis where the line crosses the x-axis. To find the x-intercept, you always use a value of y=0 because if y doesn't = 0, then the point will not be on the x-axis.

Step-by-step explanation:

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Q26. Division A has 15 students and division B has 20 students. Average score of students in division A is greater by 2 as compa

Romashka [77]

Step-by-step explanation:

Let a be the total score of Div. A

Let b be the total score of Div. B

given,

$\frac{a}{15} - \frac{b}{20} = 2$

as equation 1.

and

$b - a = 160 \\ - a + b = 160$

as equation 2.

Now multiply equation 2 by 1/20 to eliminate b to solve for a.

$( - a)( \frac{1}{20} ) + (b)( \frac{1}{20} ) = ( \frac{1}{20} )(160) \\ - \frac{a}{20} + \frac{b}{20} = 8$

take this new equation as equation 3.

now we will use equation 1 + equation 3 to eliminate b to solve for a.

$( \frac{a}{15} + ( - \frac{a}{20} )) + ( - \frac{b}{20} + \frac{b}{20} ) = 2 + 8 \\ \frac{a}{60} = 10 \\ a = 60 \times 10 \\ = 600$

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Average Score = Total Score / Number of students.

$\frac{600}{15} \\ = 40$

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