[11] B. 6
1 * 3 = 3, so 2 * 3 = 6
[12] A. 3
20 / 5 = 4, so 15 / 5 = 3
[13] B. 7
2 * 2 = 4, so 7 * 2 = 14,
[14] A. direct proportion
We can figure this out using 150:2 = x:3, which is a direct proportion because y is constant directly with x
-> Not 100% sure on this one
[15] C. partitive proportion
A proportion such as 1:2:3 is more specifically known as a partitive proportion, so this answers the question
[16] B. inverse proportion
As more painters are added, the time that is taken to paint the house decreases, so this is an inverse proportion
-> Not 100% sure on this one
[17] C. 1400 cupcakes
-> 2 weeks = 14 days
-> solve with 200:2 = x:14
-> 2*7 = 14, so 20 * 7 = 1,400
[18] D. 153
-> Putting it simpler, 2:3:3 = Grade 4: Grade 5: Grade 6
-> We are looking for Grade 6
-> 2x + 3x + 3x = 408
-> 8x = 408
-> x = 51
-> 3x = 3(51) = 153
[19] C. 16 hours
-> We can solve with 6:10 = 10:x
-> 10/6 = [tex]\frac{5}{3}[/tex], so 10 * [tex]\frac{5}{3}[/tex] = 16.666666, or for here 16 hours
[20] D. Php 750
-> Put simpler, Mark:Justin:David = 4:5:6
-> 4:5:6 = 4x:5x:6x
-> 5x = 250 which becomes 250 / 5 = 50
-> 4*50 = 200 & 6*50 = 300
-> 200 + 300 + 250 = Php 750
Have a nice day! - Note: not exactly sure on the wording for 14 & 16
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
