10. For every packet of biscuits that Akhil buys, he gets 3 pencils free. If he has collected 18 pencils, how many packets of biscuits did Akhil buy? 11. The ratio of the heights of two boys is \( 7: 6 \). If the height of the first boy is 210 cm , what is the

c) \( \left\{\begin{array}{l}6 x-38=-4 y \\ 2 y-24=-4 x\end{array}\right. \)

As a result of its high volume of trade with Great Britain, the Mughal Empire: A. rapidly upgraded its military using new technology. B. was pressured to abandon its Sharia legal system. C. controlled trade routes between Europe and Asia. D. gradually lost control over its own economy.

11. Para el siguiente sistema de ecuaciones \[ \begin{array}{r}3 x+2 y=35 \\ -9 x+5 y=-127\end{array} \]

Consider the following sum. Fill in the blanks below to complete the first step of the addition algorithm to find the units digit of the sum. \( 22_{\text {five }}+4_{\text {five }}=6_{\text {ten }}=\left(5^{0}\right)=\square \) five To complete the first step of the addition algorithm, place a \( \square \) above the five's column and place a Complete the addition algorithm to determine the sum of the two values. \( 22_{\text {five }}+14_{\text {five }}=\square \)

on to an equivalent expression in exponential notation. Assume all variables are positive. \[ \frac{\sqrt{y^{6}}}{\sqrt{y^{3}}} \]