Here is the answer (look at the photo)
Answer: 
r=26
Step-by-step explanation:
Given: Mrs. Morton rewards her students on behave well by putting 3 marbles into a marble jar.
If the jar contains 24 marbles. and r represent the number of additional times the class is rewarded then the required equation will be

If we solve it, we will get the minimum the jar contains 24 marbles.
To solve equation, subtract 24 from both sides, we get

Hence, the minimum whole number of additional times they need to be rewarded so they can have a party=26
Cool poem but what’s the question?
Answer:
Step-by-step explanation:
Researcher observes that 12 out 15 cats that approached him are males.
Therefore, number of Female Cats that approached him = 15 – 12 = 3