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3 years ago

5

An orchestra has twice as many woodwind instruments as brass instruments. there are a total of 150 brass and woodwind instrument

s.write two different addition equations that describe the situation

1 answer:

Novay_Z [31]3 years ago

3 0

X = # of woodwind instruments
y = # of brass instruments

2x = y
150 = x + y

I hope this helps you!

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$~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$6000\\ r=rate\to 4\%\to \frac{4}{100}\dotfill &0.04\\ t=years\dotfill &1 \end{cases} \\\\\\ A=6000[1+(0.04)(1)]\implies A=6240$

so had she left it in for a year, she'd have gotten 6240, namely 240 in interest, well, what fraction of a year's interest was earned? or worded differently, what fraction is 160(8 months) of 240(1 year)?

$\cfrac{\stackrel{\textit{for 8 months}}{160}}{\underset{\textit{for 12 months}}{240}}\implies \cfrac{2}{3}$

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