Variable

Q.

Answer these questions in a few words or a couple of sentences each. What subjects did Margie and Tommy learn?

Q.

The appropriate atmospheric conditions made it feasible for the astronomers to see the stars and they could even distinguish the sizes. Select the correct alternative for bolded words

Q.

Why do we Differentiate?

Q. A variable is to represent an unknown quantity in an expression.

1. an operator
2. a number
3. a symbol

Q.

Simplify combining like terms: $3a-2b-ab-(a-b+ab)+3ab+b-a$

Q. Question 1(ii)
Find the product of the following pairs of monomials:
-4p, 7p

Q.

Give an Example to Explain the Meaning of Stored and Derived Attributes

Q. Which of the following is a constant ?

1. $x$
2. 7
3. $\times$
4. None of the above

Q.

Add :$-7mn+5,12mn+2,9mn-8,-2mn-3$

Q.

In algebra, the term “8” is a constant, “$x$” is a variable but the term “$8x$” is a variable.

1. True

2. False

Q.

Question 35

The variable used in the equation 2p + 8 = 18 is ___ .

Q.

In algebra, the variables are also known as ___

Q.

Write the expressions for the following statements.

$8$ more than $z$

Q.

What must be added to $1-x+x^2–2x^3$ to get $x^3$?

1. $x^3-x^2+x-1$

2. $3x^3-x^2+x-1$

3. None of these

4. $-1+x+x^2-3x^3$

Q.

State whether the collection of difficult chapters in a Maths book is a set or not.

Q.

How many types of sums are there in algebra?

For example:expression, equation

Q.

Question 12

'Variable' means that it

(a) can take different values

(b) has a fixed value

(c) can take only 2 values

(d) can take only three values

Q.

What is the application of linear algebra?

Q.

A collection of difficult questions in your mathematics book is a set.

1. True
2. False

Q.

Question 54

The difference between the ages of two sisters Leela and Yamini is a variable.

Q. Question 12

Product of $6a^2-7b+5ab$ and $2ab$ is
a) $12a^{3}b-14a{b}^2+10ab$
b) $12a^{3}b-14a{b}^2+10a^2{b}^2$
c) $6a^2-7b+7ab$
d) $12a^{2}b-7a{b}^2+10ab$

Q.

Express the following into Hindu-Arabic system:

$MMMDXXI$

Q.

A quantity which can take various values is called a ________.

Q. Which of the following is not a variable?

1. Number of days in a week
2. 5
3. Temperature of a place in a day at different times
4. Number of months in a year

Q. Find the number of variables in the expression: $5x+8y+7$.

1. 1
2. 2
3. 3
4. 4

Q.

Which out of the following are expressions with numbers only?

(i) $2y+3$

Q.

What Are The Different Types Of Patterns In Maths?

Q. The expression that matches the statement "add 5x and 3x, then subtract from 12y” is

1. 8x - 12y
2. 8x + 12y
3. 12y - 2x
4. 12y - 8x

Q. Question 1(iv)
Find the product of the following pairs of monomials:
$4p^3,-3p$

Q.

What is the coefficient of term $x{y}^3$ in the expression $5x^3+10x{y}^3$ ?

1. -10

2. -1

3. 10x

4. 10