Answer:
1) 12 - 8/3 = ((12*3)-(8))/3 = 28/3
2) 10/ (4/7) = (10/1)*(7/4) = 70/4
3) 12/5 + 4/6 = ((5*4)+(12*6))/(5*6) = 46/15
Answer:
2:3 unless it wants it in total, then 220:330
Step-by-step explanation:
it gives you the answer with the fraction. A ratio is basically saying with x:y for every x number of one thing there are y number of another. In this case we know 2/5 will be green, so how many will be red? 3/5. So for every 2 greens there are 3 reds.
Another way of looking at it is for the totals. there are 550 total, so 2/5 of that is green. 2/5 of 550 is 220, while 3/5 is 330 so that means of the 550, the ratio is 220:330. Kinda like simplifying fractions where 220/550 is the same thing as 2/5
Answer:
this is impossible
Step-by-step explanation:
$315, i cant give a thorough explanation since i did it all in my head but basically amal gets 5 portions of the money and Salma gets 9, meaning she gets 4 more, so if 4 portions is $252 then it cant be any of the others since they are too low or way too high, $315 is the only reasonable one.
Answer:
The number is 8 because 
And if you add 4, you get 20
Hence, the number is 8
