Unformatted text preview: Week 3 CheckPoint {4 (_ '3. 'y. :36 a? E). '5. v39 *5. by. FE. b Question 2.8. @Exercise Score:_1 o? _1 pt Assignment Score: 33.3% (26.5 of.30 pts) soofan complete A car rents for $40 per day plus 1853 per mile. You are on a daily budget of $67. What mileage A car gets 23 miles per gallon minus 0.1 mile per gallon for each mile per hour over 45 mph
will allow you to stay within your budget? What is the fastest speed that the car could travel and sti get at least 21 miles per gallon? The 50111th is {m  m S 150 } The ﬁrst step is to familiarize yourself With the problem "he mileage needs to be greater
than or equal to 21 miles per gallon. You could ﬁnd the number ofmiles per hour over 45 by subtracting 45 from the speed ofthe car, or x. TE following statement describes the miles per gallon 23 minus 0.1 times the miles per hour over 45. 'ie second step is to translate. 23 minus 0.1 times the miles per hour over 45 is at least 21.
23Dl(x45) 2 21 The third step is to solve. 23—n.i(x—45)221 Question is complete. Multiply ﬁll paHs'sh'owing .. : ':
§  .  23—D_1X+4_5221 Multiply both sides by 10.
10(23— D.1X+ 4.5) 2 10(21) 23D—X+4522lﬂ Collect like terms.
— X+ 275 2 210
Subtract 225 from both sides.
—X+ 275— 275 2210— 275 —X265 ...
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 Fall '09
 CHRISDEETER

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