Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- anonymous

HELP
A zoo train ride costs $3 per adult and $1 per child. On a certain day, the total number of adults (a) and children (c) who took the ride was 30, and the total money collected was $50. What was the number of children and the number of adults who took the train ride that day, and which pair of equations can be solved to find the numbers?

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions.

Get your **free** account and access **expert** answers to this and **thousands** of other questions

- anonymous

- schrodinger

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

ANSWER CHOICES
20 children and 10 adults
Equation 1: a + c = 30
Equation 2: 3a + c = 50
10 children and 20 adults
Equation 1: a + c = 30
Equation 2: 3a − c = 50
20 children and 10 adults
Equation 1: a + c = 30
Equation 2: 3a − c = 50
10 children and 20 adults
Equation 1: a + c = 30
Equation 2: 3a + c = 50

- texaschic101

total of adults and children was 30 : a + c = 30
$3 per adult, $1 per child....total of $50 : 3a + c = 50
a + c = 30
a = 30 - c -- now sub 30 - c in for a in the other equation
3a + c = 50
3(30 - c) + c = 50 -- distribute through the parenthesis
90 - 3c + c = 50 -- subtract 90 from both sides
-3c + c = 50 - 90 -- simplify
-2c = - 40 -- divide both sides by -2
c = 20
a + c = 30
a + 20 = 30
a = 30 - 20
a = 10
so there are 20 children and 10 adults

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- anonymous

so a or c?

- texaschic101

A

- anonymous

thank u, can u do another plz

- texaschic101

what ya got ?

- anonymous

No direct answers, please.

- anonymous

How many solutions are there to the given set of equations?
Equation C: y = 3x + 7
Equation D: y = 3x + 2
How many solutions are there to the given set of equations?
One solution
Two solutions
Infinitely many solutions
No solution

- texaschic101

ok...lets do this one together
y = 3x + 7......so sub in 3x + 7 for y in the other equation
3x + 7 = 3x + 2
now do you know how to solve for y ??

- anonymous

im not super sure

- texaschic101

ooops...I mean for x

- texaschic101

3x + 7 = 3x + 2 --- subtract 7 from both sides
3x + 7 - 7 = 3x + 2 - 7 -- simplify
3x = 3x - 5 -- now subtract 3x from both sides
3x - 3x = 3x - 3x - 5 -- simplify
0 = -5
now...is that correct ? Does 0 = -5 ??

- anonymous

yes?

- texaschic101

no.....0 does not equal -5....therefore, there are no solutions to this problem

- anonymous

ohh duh i see now, thank u

- texaschic101

sure thing :)

Looking for something else?

Not the answer you are looking for? Search for more explanations.