Variable

Q.

Is differentiate the same as derivative?

Q. In algebra, a symbol, the value of which is unknown is called a ________.

1. Power
2. Constant
3. Variable
4. Degree

Q.

In subtraction problem, the greater number from which another number is subtracted is called$\_\_\_\_\_\_\_\_$

Q.

Why is a function important?

Q.

Write the expressions for the following statements.

$x$ subtracted from $2$ times $y$

Q. Which of the following can be used as a variable?

1. 5
2. $\pi$
3. a
4. $\frac{13}{5}$

Q.

'Number of seconds in one minute' is a variable.

1. False

2. True

Q.

A combination of a variable and a constant is a variable.

1. False

2. True

Q. The value of the variable which satisfies the equation is called _________ of the equation.

1. the solution
   
2. a real solution
   
3. a rational solution
   
4. the value
   

Q.

The expression $13+90$ is a ________.

Q.

The total number of planets around the Sun can be denoted by the variable n.

Q.

In the expression $2\pi r$, the algebraic variable is ________.

Q.

The algebraic expression "5x+2” does not contain any constant term.

1. True

2. False

Q.

The algebraic expression "x” does not contain any constant term.

1. True

2. False

Q. What is a variable?

1. A symbol to represent an unknown quantity in an expression
2. A constant
3. An operator
4. A mathematical statement

Q.

Question 2

In which of the following expressions only numbers are used:

(a) y + 3

(b) $(7\times 20)-8z$

(c) $5(21-7)+7\times 2$

(d) 5

(e) 3x

(f) 5-5n

(g) $(7\times 20)-(5\times 10)-45+p$

Q.

Write the expressions for the following statements.

$2$ times $y$ added to $3$

Q. The perimeter of a square is expressed as $4\times S$, where $S$ is a/an .

1. constant
2. variable
3. expression
4. term

Q.

Question 21

Fill in the blanks to make the statement true.

In the expression $2\pi r$, the algebraic variable is___.

Q.

Express the statement as an algebraic expression.

$x$divided by $5$ and subtracted from $y$ multiplied by $2$

Q.

Question 55

Answer True/False.

The number of lines that can be drawn through a point is a variable.

Q.

Write the following sets in rule method.

L = {summer season, rainy season, winter season}

Q. A ___ is a symbol, such as x, used to describe any number.

Q.

Write the constant term in the following expression :

$3x+y$

Q.

Ramesh recalled about the North Star and questioned Tina and Rina that which part of algebraic expression exhibits similar characteristics of a North Star. The answer is _______.

1. constant

2. variable

3. prime

4. none of the above

Q. 5 is a variable.

1. False
2. True

Q.

The quotient of $a$and $3$ less than twice of $a$ is-

1. $\frac{a}{a-3}$

2. $\frac{a}{2(a-3)}$

3. $\frac{a}{2a-3}$

4. $\frac{a-3}{2a}$

Q.

Classify the following into algebraic expressions and arithmetic expression$.$ Also identify the constant and variable terms in each expression$.$

$5-16y$

Q.

In algebra letters may stand for

1. known quantities

2. unknown quantities

3. fixed numbers

4. none of these

Q.

Write the algebraic expression for the given sentence:

$7$added to the product of $y$and $5$.