NA

Evaluate the following.

$7x+4$ when $x=-1$

The general rule for finding the number in a particular position in the pattern of numbers $2, 6, 10, 14. 18...$ is given by the expression $4x-2$. Find the term in the $11\mathrm{th}$ position.

The general rule for finding in a particular position in the pattern of numbers $3, 7, 11, 15, 19, ...$ is $4x-1$. Find the number in the ${10}^{th}$ position and ${100}^{th}$ position.

Find the value of the following expression:

$7a+1;$ when $a=-2$

Does the following expression contain variables?

$13x+1$

Find the value of the following expression:

$2a+b;$ when $a=1$ and $b=-3$.

Change the following algebraic expression into a statement in the ordinary language:

Sunil is $x$ years old. His wife's age is $x-6$.

Rehan attended a basketball camp for two weeks. His parents paid $₹50$, which was $\frac{1}{3}$ the cost of attending the camp. Rehan had saved money to pay the rest of the cost. Which equation can be used to find $\mathrm{c}$, the entire cost of attending the camp?