Jen Butler has been pricing Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $128. Two adults and three children must pay $91. Find the price of the adult's ticket and the price of a child's ticket.

Adults pay $20 while children pay $17

Step-by-step explanation:

Let price for adults be x while children be y

First case

Three adults and four children must pay $128

3x+4y=128

Second case

Two adults and three children must pay $91

2x+3y=91

To make x the subject

2x=91-3y

X=45.5-1.5y

Solving equations

By substituting x with 45.5-1.5y into

3x+4y=128

3(45.5-1.5y)+4y=128

136.5-4.5y+4y=128

0.5y=8.5

Y=2*8.5=17

X=45.5-(1.5*17)=20

Therefore, adults pay $20 while children pay $17

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

sorry man i accidentally pressed yes my bad

step-by-step explanation: