Answer:
It’s going to be 10/15 he answered correctly.
Step-by-step explanation:
It’s 10/15
If you want to know a easy way to find the answer for some cases, questions you can subtract it the whole number of questions, and you just do 15 - 5 = 10
So he got 10 questions right out of 15.
Answer:

Step-by-step explanation:
Based on the given conditions, formulate: 
Convert decimal to fraction:
Divide a fraction by multiplying its reciprocal:
Cross out the common factor: 
Calculate the product or quotient: 
get the result: 
Answer: 
Multiplying binomial and polynomials can be easy as long as you follow the steps for example:
Let's say you were multiplying 3x-3 and x+2
(3x-3)(x+2)
remember FOIL
OR think about it like this(see attatchment)
3x^2 + 3x -6 is what you should get
(3a) - (8a) = -5a
2b + b = 3b
-5a + 3b