Answer:
10 km in 97 seconds, 8 km in 83 seconds, 18 km in 198 seconds, 15 km in 168 seconds.
Step-by-step explanation:
The unit rate for each session can be found by dividing the kilometers by the seconds. Then, make an equivalent fraction by dividing both the numerator and denominator by the numerator. This will show how many seconds it took to finish 1 kilometer during that session.
Answer:
20
Step-by-step explanation:
5x4= 20
Answer:
76 comic books
Step-by-step explanation:
First we must structure a formula in order to solve for the number of comic books that Michelle initially had. The formula for this problem would be:
x · \frac{1}{2}x + 18 = 56
In order to solve for x, the initial number of comic books Michelle had, you would need to subtract 18 from 56. You would then have 38. So:
x · \frac{1}{2}x = 38
Next, you'd need to get rid of the \frac{1}{2}. In order to do that, you would divide \frac{1}{2} by 38. Now, we should be left with:
x · x = 76
Now, we don't really need both x's. We can already conclude that x is equal to 76, since the following is true:
76 comic books - \frac{1}{2} (76) sold + 18 bought = 56 comic books left.
Therefore, your answer is 76 comic books.