Solves Problems Involving Algebraic Expressions

Robert wants to fence his rectangular lot. If the length of the lot is 3 meters longer than its width. What is the perimeter of the of the rectangular lot if its width is y meters?

• 4y + 6 meters

• 6y + 4 meters

• 4y – 6 meters

• 6y – 4 meters

Rose had ten roses (r) in her garden. During weekends she buys additional roses. Express her total roses in algebraic expression.

• 10r

• r – 10

• 10 – r

• 10 + r

In Grade 7- Belardo, there are 15 girls and b boys. Which of the following expression represents the total number of students in the class?

• 15 – b

• 15 + b

• b – 15

• 15b

I already have 5 pens, Mark give me 2 packs of pens. Each pack contains p pens. How many pens do I have now?

• 2p + 5

• 2p – 5

• 5p + 2

• 5p – 2

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

​ (a)  

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80

The equation for the table below is y=2x+5, fill in the missing values.

c

d

e

f

7

3

0

9

4

-1

Which expression represents: "the product of 3 and x increased by 5"? 

• 5x - 3

• 3 - 5x

• 3x + 5

• 3x(5)

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80

There are y carabaos and d ducks in the farm. How many legs are there?

• 2y – 4d

• 2y + 4d

• 4y – 2d

• 4y + 2d