SOLUTION: 4. Fundraising. The St. Mark’s Community Barbecue
served 250 dinners. A child’s plate cost $3.50 and
an adult’s plate cost $7.00. A total of $1347.50 was
collected. How many of
Algebra.Com
Question 332971: 4. Fundraising. The St. Mark’s Community Barbecue
served 250 dinners. A child’s plate cost $3.50 and
an adult’s plate cost $7.00. A total of $1347.50 was
collected. How many of each type of plate
was served?
Answer by benazir.sj@gmail.com(109) (Show Source): You can put this solution on YOUR website!
you have to solve this question by linear eqaution:
Let the childs plate =C
and the adult plate =A
total number of dinners =250
C+A=250----------------(1)
cost of chids plate =$3.50
cost of adults plate =$7.00
total cost =$1347.50
$3.50C + $7.00 A=$1347.50 ---------------(2)
now equate the equations (1) and (2)
C+A=$250
*7C+7A=7*250
7C+7A=1750------(x)
3.50C+7A=1347.50-----(2)
______________________________
(x)-(2) => 3.50C =402.5
C=402.5/3.5
C=115
C+A=250
A=250-115=135
Childs plate =115and adults plate =135
proof:
$3.50C + $7.00 A=$1347.50
$3.50*115 +$7*135 =$1347.50
$402.5+$945 =$1347.5
$1347.50=$1347.50
RELATED QUESTIONS
Fundraising. The St. Mark’s Community Barbecue served 250 dinners. A child’s plate cost... (answered by jojo14344)
Fundraising. The St. Mark’s Community Barbecue served 250 dinners. A child’s plate cost... (answered by orca)
The St. Mark’s Community Barbecue served 250 dinners. A child’s plate cost $3.50 and an... (answered by PRMath)
The St. Mark’s Community Barbecue served 250 dinners. A child’s plate cost $3.50 and an... (answered by PRMath)
Fundraising- The St. Marks Community Barbecue served 250 dinners. A child's plate cost... (answered by checkley77)
The Downtown Community Barbecue served 335 dinners. A child’s plate cost $3.40 and an... (answered by ReadingBoosters)
Fundraising. The Buck Creek Fire Department served 250 dinners. A child’s plate cost... (answered by ikleyn)
The St. Mark Community babecue served 250 dinners. Achilds plate cost $3.50 and an adult... (answered by alicealc,rfer)
The St. Mark's Community Barbecue served 250 dinners. A child's plate cost $7.00. A... (answered by stanbon)