#10 ) 6/x = 5/11 OR 6/x = 9/19.8
5x = 66 9x = 118.8
x = 13.2 x = 13.2
#11 ) original photo is 5 inches by 7 inches, multiply that , = 35 ( area of original photo )
new photo is "3 times larger" so 5 become 15 and 7 become 21 , multiply that which gives you 315 (area of enlarged photo )
take the enlarged photo's area divided by the original photo's area which gives you 9
#12 ) 6/8 = x/12
72 = 8x
9 = x
#13 ) set equal to find segment TR : 4/10 = 6/x
4x = 60
x = 15
then find the perimeter of triangle by P = a + b + c
P = 10 + 12 + 15
P = 37
