The word 'difference' indicates the use of subtraction in a Mathematical sum
The error is that the sum could be 15 - 5y instead of 5y - 15
A subtraction sum does not have the commutative properties, meaning that we cannot do the sum in any order.
A sum 15 - 5y will give a different result with the sum 5y - 15 for the same value of y.
Answer:
one pencil cost $0.15
Step-by-step explanation:
Answer:
We have a1 = 27 and r = 3 (because 27:9 = 3; 9:3 = 3; 3:3 = 1);
Then s = 27 / (1 - 3) ;
Finally, s = - 27 / 2;
Step-by-step explanation:
Answer:
476
Step-by-step explanation:
Currently there are 28 children playing. Until a moment ago, 4 of those 28 werent there. To find out how many there were a moment ago, we have to exclude those 4 kids that just came — or subtract the number of kids that just came from the number of kids currently playing.
28-4=24
We can check: 24+4=28
