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tester [92]
3 years ago
7

in a school ,the number of boys who play cricket is 3 times as much as a number of boys who play tennis. if 12 boys, who play cr

icket, play tennis instead, the number of boys who play each of these sports would be the same. find the number of boys who play tennis
Mathematics
1 answer:
Ierofanga [76]3 years ago
8 0

Answer:

The number of boys who play tennis is 36.

Step-by-step explanation:

Let the number of boys who play tennis is x.

number of boys who play cricket = y

x = 3 y..... (1)  

12 boys plays both cricket and tennis.

According to the question,

x - 12 = y + 1 2

3 y - 12 = y + 12

2 y = 24

y = 12

So, the number of boys who plays tennis is x = 3 x 12 = 36.  

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What are the roots of the equation x^2+6x-9=0
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Answer:

x = approx. 1.24 or -7.24

Step-by-step explanation:

It's hard to factor directly so we should use the quadratic formula or complete the square. I'm going to go with completing the square.

x²+6x-9=0

x²+6x=9

x²+6x is the same as x²+2·3·x, in order to make this into the algebraic identity (A+B)²=A²+2AB+B², we must add B², or in this case 3² to both sides. (A is x, B is 3)

x²+6x+9=18

(x+3)²= 18

x+3= ±√18

x= ±4.24 -3 (approximately 4.24)

First solution for  x = 4.24-3 = 1.24

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3 years ago
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Step-by-step explanation:

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2 years ago
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professor190 [17]
2(5x)2(-7)=2x+10

2(5x)= 10x
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10x-14=2x+10

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10x-2x=8x

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What is the perimeter of this square?
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We need the square and the lengths of it to help you
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Which of the following correctly justifies statement 4 of the two-column proof?
slavikrds [6]

Answer:

D.Transitive property of equality

Step-by-step explanation:

We are given that segment JK is parallel to segment LM

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3 0
2 years ago
Read 2 more answers
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