So, as you can see from the picture below
the line coming down from the right-angle, creates 3 similar triangles
a large, a medium and a small one
the large one, is the one containing the other two smaller ones... anyhow
to get "x", you can use proportions, either from large and medium or small and large so
![\bf \cfrac{large}{medium}\qquad \cfrac{15}{12}=\cfrac{9}{x}\qquad \qquad \cfrac{small}{large}\qquad \cfrac{9}{15}=\cfrac{x}{12}](https://tex.z-dn.net/?f=%5Cbf%20%5Ccfrac%7Blarge%7D%7Bmedium%7D%5Cqquad%20%5Ccfrac%7B15%7D%7B12%7D%3D%5Ccfrac%7B9%7D%7Bx%7D%5Cqquad%20%5Cqquad%20%5Ccfrac%7Bsmall%7D%7Blarge%7D%5Cqquad%20%5Ccfrac%7B9%7D%7B15%7D%3D%5Ccfrac%7Bx%7D%7B12%7D)
solve for "x", either proportion will do
yellow car = x
white cars = 9x ( 9 times as many white cars)
9x +x = 40
10x = 40
x = 40/10 =4
4 yellow cars
9*4 = 36 white cars
The square root of 82 is slightly more than 9 and is greater 3 is the appr. squ. root of 8
The factors of the number 10,000 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 10000.
25 factors
Hope this helps! Have a great day!