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Grade:
7
, Subject:
Math
, Topic:
Variables and Algebraic Expressions
Question 1:
Find the expression that makes the solution table true.
2y
^{2}
+ 5
+ 10
+ 10
+ 12
Question 2:
Write as an algebraic expression.
The sum of y and 10 is 3 more than n.
(y + 10) = n + 3
(y + 10) − 3 = n
(y + 3) = n + 10
(y + 10) + 3 = n
Question 3:
Write an algebraic expression for the following statement.
[Hint: Let
y
be the first number.]
The sum of three consecutive whole numbers.
y + 2y + 3y
3y +1
y + (y + 1) + (y + 2)
y + y + y
Question 4:
The statement "one-fourth of a number y, decreased by thirty-six" is represented by which of these expressions?
36 −
4y− 36
− 36
36 −
Question 5:
Evaluate the following algebraic expression for b = 4.
3(2b − 2) + (−b + 1)
33
15
21
12
Question 6:
What value of
x
will make the following equation true?
+ 8 = 18
50
25
32
60
Question 7:
Derek made a total of $130 by selling 5 magazines and 6 coupon books. He sold each coupon book for $12.50. Which equation can you use to find the cost, c, of each magazine?
5 + c + $12.50 × 6 = 130
6c + $12.50 × 5 = 130
5c + $12.50 × 6 = 130
c + $12.50 × 6 = 130 − 5c
Question 8:
Write as an algebraic expression.
Number of hours in d weeks.
168 + d
168d
Question 9:
The sum of a number y and 3, multiplied by 5 is 30. Find that number.
3
5
6
9
Question 10:
Which equation best represents the data shown in the table?
y = x
^{2}
+ 5
y = −x
^{2}
+ 3
y = −2x
^{2}
− 5
y = −x
^{2}
+ 5
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