Finding the Value of an Expression

Q.

(|x+2|-x)/x

What is the solution of this inequality?

Q.

Write the following as an equation:
$4timesanumberincreasedby7is112.$

Q. To find the value of 'x' in an algebraic equation, trial and error method can be used.

1. True
2. False

Q. Convert Tree diagrams into Algebraic expressions.

Q. 4xy -2xy+ 3xy ; when X=-1, y=2

Q. The number of ordered pairs (x, y) of positive integers satisfying the equation 1/x + 1/y = 1/20 is

Q. Radha is drawing a dot Rangoli with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for r rows ? How many dots are there if there are 8 rows ? If there are 10 rows ?

Q. How many diagonals does a hexagon have?
(Hint: A hexagon is a polygon with six sides.)

1. 9
2. 8
3. 15
4. 7

Q. How many diagonals does a hexagon have?
(Hint: A hexagon is a polygon with six sides.)

1. 9
2. 8
3. 15
4. 7

Q. The quotient of x by 3 is multiplied by y is written as

(a) $\frac{x}{3y}$
(b) $\frac{3x}{y}$
(c) $\frac{3y}{x}$
(d) $\frac{xy}{3}$

Q. Rina wanted to make the number “$262226$” using matchsticks. How many matchsticks are required to make the given number?

1. $21$
2. $26$
3. $32$
4. $36$

Q. simplify $x^2+24x+144=0$

Q. To find the value of 'x' in an algebraic equation, trial and error method can be used.

1. True
2. False

Q. If $x=2$ and $y=10$, evaluate :

iv) $5y^2$

Q. Rewrite using a variable: the difference obtained by subtracting 16 from another number.

1. x + 16
2. x - 16
3. 16 + x
4. 16 - x

Q. There is a certain number, whose value is unknown. But it is known that when 5 is added to that number, we get 15. What is the value of the number?

1. 12
2. 11
3. 9
4. 10

Q. Simplify: $x-(3-x)$

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

Q. Number to be added on LHS of equation $y-4=2$ to find the value of ${}^{\prime }{y}^{\prime }$ is ________.

1. $4$
2. $-6$
3. $0$
4. $6$