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Paraphin [41]
2 years ago
13

There were 20 boys and 26 girls in a chess club last year. This year the number of boys increased by 30% but the number of girls

decreased by 15%. Was there an increase or
decrease in overall membership?
Mathematics
1 answer:
Readme [11.4K]2 years ago
5 0

Step-by-step explanation:

Boys

20 + (20 \div 100)30 = \\  = 20 + 0.2 \times 30  =   \\  = 20 + 6 = \\26

Girls

26 - (26 \div 100)15 = \\  = 26 - 0.26 \times 15 =  \\  = 26 - 3.9 = \\  = 22

Total last year 46

Total this year 48

Increase

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Now we have y=5x+b, where b is the y-intercept. Since we know that the perpendicular line passes through the point (1,4), we can substitute those values into the equation we have to find b.

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