Rahul Sofat Solutions for Chapter: Algebraic Expressions, Exercise 7: SOME NCERT TEXTBOOK QUESTIONS

If $m=2$ find the value of

$3m^2-2m-7$

If $m=2$ find the value of

$\frac{5m}{2}-4$

If $z=10$, find the value of $z^3-3\left(z-10\right)$

If $p=-10$, find the value of $p^2-2p-100$

What should be the value of $a$ if the value of $2x^2+x-a$ equal to $5$, when $x=0$?

Observe the pattern of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.

If the number of digits formed is taken to be $n$, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.

How many segments are required to form $5, 10, 100$ digits of the kind

Observe the pattern of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.

If the number of digits formed is taken to be $n$, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.

How many segments are required to form $5, 10, 100$ digits of the kind

Observe the pattern of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.

If the number of digits formed is taken to be $n$, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.

How many segments are required to form $5, 10, 100$ digits of the kind