Leamers are asked to build an electrical toy car within two days. What do we call the allocated time?

1. The expression \( 0.9(2 x+5) \) represents how much Stacy pays for \( x \) games of bowling at Lively Lanes. The expression \( 4.50+1.80 x \) represents how much Parker pays for \( x \) games of bowling at Bowling and More. For how many games of bowling would they pay the same amount?

Combine the following expressions. \( 4 a \sqrt{b}+7 a \sqrt{b}=\square \)

(iii) \( \left(m^{4} n^{7}\right)^{3} \)

\( \left. \begin{array} { l }{ y = \cosh ^ { - 1 } x } \\ { \frac { d y } { d x } = } \end{array} \right. \)

Multiply: \( \frac{4}{5}\left(\frac{5}{4}\right)=\square \)