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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
3.1 Coefficient

Algebraic Expression:
  • An expression is a meaningful collection of numbers, variables, and signs, positive or negative, of operations that must make mathematical and logical sense.
  • Expression contain any number of algebraic terms
  • Terms are separated by addition or subtraction
  • Expression use signs of operation—addition, subtraction, multiplication, and division.
  • It do not contain an equality sign (=)
Example
Expressions Not expressions:
x + y
7xy
a + b
-2/3s2
a + • b as it contains two operations in between the terms
y = 2x – 1 contains equal sign

Algebraic Equation
  • It is a mathematical statement or algebraic expression with an equal sign.
  • Example:
    x + y = 0
    7xy = 0
    a + b = 0
    -2/3s2 = 0 4ab = 23

Example: Write the coefficient of x in 7x.
Solution: The coefficient of x in 7x is 7

Example: Write the coefficient of (7x+9) in 3(7x+9).
Solution: The coefficient of (7x+9) in 3(7x+9) is 3


Directions: Find the coefficient of the given problems. Also write at least ten examples for algebraic expressions, algebraic equations and coefficients.
Q 1: What number is the coefficient of x2 in the expression -5x3-1/2x2-5?
Answer:

Q 2: What number is the coefficient of y in the expression 5x − 4y − z?
Answer:

Q 3: Write the coefficient of (2x+3) in 7(2x+3)?
Answer:

Q 4: What number is the coefficient of x3 in the expression 23x3?
Answer:

Q 5: What number is the coefficient of ab in the expression 5ab − 4a − c?
Answer:

Q 6: Write the coefficient of (x+2) in (9/8)(x+2)?
Answer:

Q 7: What number is the coefficient of z in the expression 5x − 4y − z?
Answer:

Q 8: Write the coefficient of x in (7/5)x?
Answer:

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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