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bagirrra123 [75]
3 years ago
9

Answer only the last question where it says (why can no angel)

Mathematics
1 answer:
Igoryamba3 years ago
8 0
Because three points of the angle have to be named ex; angle ABC
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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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\frac{600}{15}  \\  = 40

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3 years ago
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