Evaluate \( a-b \) if \( a=-2.5 \) and \( b=\frac{2}{5} \). Write your answer as a decimal to the nearest tenth.

Simplify \( 6+3 \times 5 \) \( 20-7 \times 2 \) \( 4+5 \times 4 \)

(ii) \( \begin{array}{r}5.129 \times(-0.15) \\ .23 \\ 5.129 \times 6\end{array} \)

8. A gym membership costs \( \$ 20 \) per month plus a one-time regstration fee. If you poid a total of \( \$ 180 \) after 6 months, how much was the regstration fee?

1.1.1. A prime number between 5 and 16... A. 17 B. 7 C. 20 D. 21

If \( a=5.6(1 \mathrm{dp}), b=24.1(1 \mathrm{dp}), c=145 \) (3sf) \( \mathrm{d}=0.34(2 \mathrm{dp}) \) Calculate the upper \& lower bounds to \( 3 s f \). \( {c d^{3}}^{3} \)