Monica Capoor Solutions for Exercise 13: Multiple Choice Questions

$x+\left(x-y\right)+y+\left(y-x\right)$ equals

If the sides of a triangle are $3x+4, 5x-2$ and $x+9$, then its perimeter is:

$xy-zx+yz+xz-yx-yz$ equals

The coefficient of $y^2$ in the sum of $-6y^2+7xy$ and $-5y^2$ and $16y^2-13xy$ is:

$-8ab-\left(-8ab\right)$ equals

On simplification, $-3x-\left[2x-\left(4x+y\right)\right]$ equals

The value of $\frac{3}{5}{x}^3+1$, when $x=-1$ is:

If the value of the expression $-3x^2+5x+p$ for $x=0$ is $7$, then the value of $p$ is: