Algebraic Expressions,Direct & Inverse Proportion Class 8

If x,y and z are variables, then x+y+z is a

• Monomial

• Binomial

• Trinomial

• Quadratic

• (a+b)(a-b)

• (a-b)(a-b)

• (a-b)(a+b)

• (a+b)(a+b)

An algebraic expression that has only one term (Type answer in all small letters)

(a)  

A symbol which takes various numerical values is called a constant

• True

• False

Which of the following is in Direct Proportion ?

• One side of a cuboid and its volume

• Number of pipes to fill a tank and the time to fill the same tank

• Change in weight and height amongst individuals

• Speed of a vehicle and the distance travelled in a fix time interval

15 books weigh 6 kg. What will 6 books weigh ?

• 2.4 kg

• 3 kg

• 1 kg

• 4.2 kg

Question 21.If 8 men can do a piece of work in 20 days, in how many days could 20 men do the same work ?

• 6 days

• 8 days

• 4 days

• 3 days

The constant of variation, if x ∝ y, from the following table is

• 1

• 2

• 3

• 4

If x = 20 and y = 40, then x and y are:

• Directly Proportional

• Inversely proportional

• Cannot be determined