Respuesta :
Set up two equations:
Let a = adults and c = child:
a + c = 289 ( rewrite as a = 289 - c)
1.50c + 4a = 746
Replace a with the rewritten formula:
1.50c + 4(289-c) = 746
SImplify:
1.50c + 1156 - 4c = 746
Combine like terms:
-2.50c + 1156 = 746
Subtract 1156 from both sides:
-2.50c = -410
Divide both sides by -2.50
c = -410 / -2.50 = 164
Number of children = 164
Number of adults = 289 - 164 = 125
Answer:
[tex] x+y = 289[/tex] (1) total people entered
[tex] 1.50 x +4 y = 746[/tex] (2) total amount collected
From the first equation we can solve for x and we got:
[tex] x = 289-y[/tex] (3)
Replacing (3) into (2) we got:
[tex] 1.5(289-y) +4y = 746[/tex]
And solving for y we got:
[tex] 433.5 -1.5 y +4y = 746[/tex]
[tex] 2.5 y= 312.5[/tex]
[tex]y=\frac{312.5}{2.5}= 125[/tex]
And then using (3) we can solve for x and we got:
[tex] x= 289-125= 164[/tex]
So then we have:
number of children = 164
number of adults = 125
Step-by-step explanation:
Let x the number of children and y the number of adults. From the info given we can set up the following equations:
[tex] x+y = 289[/tex] (1) total people entered
[tex] 1.50 x +4 y = 746[/tex] (2) total amount collected
From the first equation we can solve for x and we got:
[tex] x = 289-y[/tex] (3)
Replacing (3) into (2) we got:
[tex] 1.5(289-y) +4y = 746[/tex]
And solving for y we got:
[tex] 433.5 -1.5 y +4y = 746[/tex]
[tex] 2.5 y= 312.5[/tex]
[tex]y=\frac{312.5}{2.5}= 125[/tex]
And then using (3) we can solve for x and we got:
[tex] x= 289-125= 164[/tex]
So then we have:
number of children = 164
number of adults = 125