1. The problem asks to expand and simplify the expression $7(5k - 6)$ and write it in the form $ak - b$ where $a$ and $b$ are numbers. 2. Use the distributive property formula: $$a(b + c) = ab + ac$$ which means multiply each term inside the parentheses by the factor outside. 3. Apply this to $7(5k - 6)$: $$7 \times 5k - 7 \times 6 = 35k - 42$$ 4. So, the missing terms are $35$ and $42$. 5. Final answer: $$7(5k - 6) = 35k - 42$$ This means multiplying 7 by each term inside the parentheses separately and then combining the results.