Num./Alg. Expressions
Is the following expression numerical or algebraic?
15 - (4 + 6)
numerical
10 + 6 x 7
52
Are the following expressions equivalent 30 - 15 and 5 x 3 ?
Yes!
t - 14 when t = 38
24
Write an equivalent expression for 4 x 4 x 4 x 4 x 4
45
Is the following expression numerical or algebraic?
13a - 10 x 9
algebraic
42 - 2(4+1)
6
Are the following word phrases also equivalent expressions?
a number minus 5
5 less than a number
Yes!
x - 5
x - 2y when x = 50 and y = 15
20
Evaluate 34
81
14 minus 8
14 - 8
12 / 2 x 3
/ means divide
18
The product of 6 and 7
The sum of 30 and 10
4b + c when b = 12 and c = 12
60
Rewrite 76 as a different expression
7 x 7 x 7 x 7 x 7 x 7
The length of a rectangle is six times the width. If the width is represented by z, then write an algebraic expression that describes the length.
6z
4 x 5 / 10
2
102 - (50 / 2)
25 x 3 - 10
No! 102 - (50 / 2) = 75
25 x 3 - 10 = 65
xyz when x = 2, y = 3, and z = 6
36
Evaluate 2x2 + y when x = 3 and y = 4
22
You worked on a school project every day for 7 days. Each day, you worked for 2 hours in the morning and 3 hours in the afternoon. What expression correctly represents the total number of hours you worked on the project?
7(2+3)
15 - 3 + 6 + 2 - 8
12
Are the following scenarios equivalent?
- 12 more than the quotient of 6 and y when y =2
- 4 less than m when m = 19
Yes!
6/2 + 12 = 15
19 - 4 = 15
You are buying balloons for a party. A small balloon costs $2. A large balloon costs $3. The algebraic expression for the cost of x small balloons and y large balloons is 2x + 3y. Find the total cost for 10 small balloons and 8 large balloons.
$44
The volume of a cube is s3 where s is the side length. Find the volume of a cube with side length 5 units.
125 cubic units