This Math quiz is called 'Pre-Algebra - Variables' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
It costs only $12.50 per month to play this quiz and over 3,500 others that help you with your school work. You can subscribe on the page at Join Us
Algebra comes with a whole new set of terminology to learn. One of those terminologies is that of a monomial. A monomial is a polynomial that has only one term. So what is a polynomial?
A polynomial is an expression of variables and coefficients. The variables and coefficients involve mathematical operations that include addition, subtraction, multiplication and non-negative integer-exponents.
So, what is a variable? A variable is an alphabetic character used to represent a number that is not known. For example: x + y. The “x” and “y” are variables used in place of numeric numbers that are not known.
What is a coefficient? A coefficient is a known number that is linked to a variable. For example: 7x + 3y = 29. In this example the 7 and the 3 are coefficients because they are linked to variables. The 29 is a constant number and is not a coefficient because it is not linked to a variable.
Whenever a coefficient is linked to a variable, it is understood that the operation will be multiplied. Again looking at the above example, we know that 7 times an unknown number plus 3 times an unknown number will equal 29. When replacing a variable with a number, the number is placed within parentheses. Now let’s look at the solution to our problem as it should be written out.
7(2) + 3(5) = 29
7 x 2 = 14
3 x 5 = 15
14 + 15 = 29
x = 2
y = 5
You've had your free 15 questions for today. Interested in playing more? You'll need to subscribe.
If you are a student, visit our Students page.
If you are a teacher, sign up for a free 30-day trial. (We will require your email address at the school for verification purposes.)