If you would like to know what is the cost to insure a car valued at 15400, you can calculate this using the following steps:
$8 ... $1000
$x = ? ... $15400
8 * 15400 = 1000 * x /1000
x = 8 * 15400 / 1000
x = $123.2
The correct result would be $123.2.
Its an isosceles triangle and just for future reference, you can google the types of triangles and you will find websites with definition and answers
X= fancy, y= plain
x+y= 7
28x+ 15y=131
solve by substitution
I think its the answer is 10%