There is 260 economy seats, and 100 businesses class —- Working out 13+5 = 18, 360/18 = 20, 20x13 =260 amd 5x20 = 100
Step 2: commutative property of multiplication
Step 3: multiplicative inverse
Step 4: multiplicative identity
Total ratio = 4+7 = 11
33/11 = 3
4x3 = 12
7x3 = 21
so the two groups are 12:21
which is also = 4:7
I would say. C
Since 100 factor is 10b. And -144 is 12a^2
hope this helps and you get it right
I would say duolingo. it's an app, not a website though
