Urgent 20 ! with this. solve preferably using cramers rule. if can't use any solving method. will make branliest if solved using cramers

x=8, y=14; x= senior citizens tickets, y= child tickets

Step-by-step explanation:

38=3x+y

52=3x+2y

move expression and change sign,

-3x+38=y

-3x=y-38

change the signs on both sides of equation

3x=-y+38

substitute

52=-y+38+2y

solve for y

y=14

substitute into the expressions

52=3x+2x14

solve for x, multiply the numbers

52=3x+28

move variables

-3x+52=28

move constant

-3x=28-52

calculate

-3x=-24

x=8

Don't know how to do Cramer's rule, but I hope this helps, at least

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

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240