Math

Question 1

What is a shortcut to see if a number is evenly divisible by 3?

Answer 1

If the sum of all the digits is divisible by 3, then full number is divisible by 3.

Question 2

Explain distributive property

Answer 2

a * (b + c) = a * b + a * c

Question 3

How would you make an equivalent expression using subtraction rather than addition.

Answer 3

Subtraction is adding the opposite. so a + b = a - (-b)

Question 4

How do you get the log of two products?

Answer 4

log⁡b(x∗y)=log⁡b(x)+log⁡b(y)

Question 5

How you get the log of a fraction?

Answer 5

logb​(x/y)=logb​(x)−logb​(y)

Question 6

How do you get the log of a power?

Answer 6

logb​(x^y)=y∗logb​(x)

Question 7

How do you change the base of a log?

Answer 7

logb​(x)=logc​(x)/logc​(b)​ changes from base b to base c

Using a log base of whatever, divide the log of your number by the log of your new base.