Question

Which of the following expressions has a coefficient of 10 and a constant of 5?
10 – 5 , 10 + 5r , 10r + 5 , 10+5

1. RobertKer

2. ThanhThu
10r+5
Step-by-step explanation:
Below, we’ll examine definitions of “coefficients” and “constants” in the context of the correct answer “10r+5”
Coefficients
Coefficients are numbers that are multiplied to letters.  When a number is multiplied to a letter, the multiplication symbol is often not explicitly written in.
In this case, the 10r means there are ten r’s, similar to how if one had ten cars, one could say 10 cars (without needing to write in a multiplication symbol).
Constants
Constants are numbers that are not multiplied to a number.  They are a number on their own that may (or may not) be connected to something else by addition (note: it may also be connected to something by “subtraction”, but the subtraction should instead be thought of as “plus a negative”).
In this case, the 5 is by itself (not multiplied to anything), and is added to other things.