Numbers between 30 and 60 with a ones digit of 3 are 33, 43, and 53. Both 43 and 53 are primes, so this answer is flawed.
Answer:
C
Step-by-step explanation:
Quadratic formula is used only to solve the quadratic equations .
Means the equation of the form

In this the x^2 part is must because that only makes the equation a quadratic.
Looking at the four options given to you , only the option C has the missing x^2 term, which makes it a linear equation and hence the quadratic formula cannot be applied there .
So the right option for your question with the quadratic formula is
option
C
For this question you can say:
8/12 = ?/15
so ? is your answer:
15*8/12 = 10
so the answer is 10 :)))
i hope this is helpful
have a nice day