Answer:
3
Step-by-step explanation:
12 plus 3=15
15 divided by 5=3
The original number is 3. To solve this you can take your final result (12) and ADD what you subtracted from the product (3) which would then give you the product (15). Next to find your beginning value you can divide by 5.
12+3 = 15
15/5 = 3
1,-1
This is because the numbers are increasing.
M = Gradient M = 1/1 = 1
d=rt
divide by r on both sides
d/r = t
300/60 =t
5=t
t=5 hours
d/t =r
250/4.5 =r
55.5555555=r
55 5/9 miles per hour
