Evaluating Algebraic Expressions

Simplify: 3(5) + 5(7)

• 25

• 35

• 45

• 50

Evaluate 3a – 15 when a = 4 .

• -5

• -3

• 3

• 19

The cost of x notebook is 20𝑥 pesos. How much do you pay for one notebook?

• 20

• 21

• 201

• 210

To evaluate algebraic expression means to replace a variable by a particular value and to simplify the expression.

• True

• False

If x = -2, then the value of 3x + 5 = -1 .

• True

• False

Evaluate 15 – 2y when y = -10 .

• -15

• -8

• 27

• 35

A car travels at 12𝑥 ² kph. How far will the car travel in 2 hours?

• 45 km

• 48 km

• 51 km

• 57 km

Evaluate 

 $\frac{5y\ -\ 3}{2y+4}$  when y = 2.

•  $\frac{7}{8}$  

•  $\frac{7}{26}$  

•  $\frac{4}{8}$  

•  $\frac{4}{27}$  

Which of the following open sentence is CORRECT when we substitute 5 in x that will make the sentence true?

• 3x + 2 = 17

• 6x – 4 = 30

• 12 + 2x = 24

• 21 = 7x

If c = 5 and s = 10, then the expression 12c + 3s = ______.

• 30

• 60

• 90

• 120