Suppose that the amount of time it takes to build a highway varies directly with the length of the highway and inversely with the also that it takes 200 workers 3 weeks to build 2 miles of highway. How long will it take 250 workers to build 5 miles of highway?

2.3 Express \( \frac{1}{\sqrt{2}+1} \) in its simpl

November 2018 ZIMSEC Paper 1 Solve the following simultancous equations: \[ \begin{array}{l}e^{2 x+y}=1 \\ 4 x-3 y=10\end{array} \]

Question 8 ( 3 marks) What is the equation of the line that passes through the points \( (1,6) \) and \( (3,2) \) ? \( y=\square x+\square \)

2imalify \( \frac{x^{2}-y^{2}}{x^{2} x y} \) \( \frac{y+2 x-3 y}{3 x-2 y}=4 \), evaluate \( 2 x y \) If \( z=\sqrt{x^{2}-y^{2}} \), express \( x \) interm 9 \( y \) and 2

\( x = \frac { - ( - 1 ) \pm \sqrt { - 79 } } { 2.1 } \)