A survey indicated that 2 out of 4 doctors used brand X aspirin. If 1000 doctors used brand X, how many doctors were surveyed? P
1 answer:
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We know that
• Lashonda purchased a prepaid phone card for $20.
,• Long-distance calls cost 8 cents a minute.
,• The remaining credit on her card is $17.12.
This problem can be expressed as
Where <em>x</em> is the number of minutes.
We solve the equation for <em>x</em>
Then, we divide by -0.08 the equation