Solving Systems of linear Equations and Problem Solving
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Caleb has a total of 130 coins, all of which either dimes or quarters. The total value of the coins is $26.50. Find the number of each coin. A. 20 dimes + 10 quarters = 130 B. 40 dimes + 90 quarters = 130 C. 70 dimes + 78 quarters = 130 | B. 40 dimes + 90 quarters = 130
40*(.10)+90*(.25)= $26.50
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| Domo Sims has been pricing speed-pass train fares for a group trip to New York. Three Adults and four children must pay $124. Two adults and three children must pay $88. Find the price of the adults ticket and the price of a childs ticket. | Childrens ticket = 16
Adults ticket = 20
2(3A+4C)= 2(124)
-3(2A+3C)= -3(88)
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| Given the cost function C(x) and the revenue function R(x), find the number of units x that must be sold to break even. C(x)= 12+80000 and R(x)=17x | X= 16000
Set C=R
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| Jehkota Harris top scorer for mens basketball league for the 2006 regular season, total of 863 points. Number two-point field goals made was 75 less than double the number of free throws made was 28 less than the number of two point field goals he made. | X= 145 free throws
Y= 173 2 points
Z= 124 three points
(1) y=2z-75
(2) x=y-28
(3) x+2y+3z= 863
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| What are the length and width of a rectangular traffic sign if the length exceeds the width by 2 inches and the perimeter is 148 inches? L= W+2 2L+2W= 148 | Length= 38
Width= 36
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| Abstract office supplies estimate that $6,000 of new manufacturing equipment will need to be purchased and that the cost of constructing each desk will be $150. Also estimates that the revenue from each desk will be $450. R(x)= 450 C(x)= 6000+ 150x | X= 20
Set C=R
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| Doreen Schmidt is a chemist. She needs to prepare 24 ounces of a 8% hydrochloric acid solution. Find the amount of 12% solution and the amount of 6% solution should she mix to get this solution. X+Y=24 | X= 16
Y= 8
-6(X+Y)= -6(24)
.06x+.12y= 1.92 (times by 100 to eliminate decimals)
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