Answer for this pelase

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Use the x-intercept method to find all real solutions of the equation. x^3-10x^2+27x-18=0

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36