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Vikentia [17]
3 years ago
6

Luis bought stock for $83.60.The next day the price increased $15.35.This new price changed -4.75% the following day.what is the

final stock price?
Mathematics
1 answer:
Alexxandr [17]3 years ago
7 0

83.60 - 15.35 - 4.75
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Yesterday, teddy played a game repeatedly on his computer and won exactly 85% of the games he played. today, teddy played the sa
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The equation we use here is:
(0.85)x +(1.00)y = (0.94)(x + y)
x is for the number of games he played on first day, y is the games on second day. The coefficients are the decimal form of percentages.

Simplify:
0.85x + y = 0.94x + 0.94y \\ \\ 0.06y = 0.09x \\ \\ \frac{6y}{100} = \frac{9x}{100} \\ \\ 6y = 9x \\ \\ 2y = 3x

To find x we need to use the ratio. We have 85/100 as the first day's ratio and because the games needs to be whole, we can simplify this as 17/20. So in first day, he played at least 20 games and won 17 of them.

When we plug the 20 into the equation as x:
2y = 3 \times 20 \\ \\ 2y = 60 \\ \\ y = 30
So he needs to play at least 30 games in order to get his score to 94%.
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