exam Maths Puzzle Numerical Ability

a recipe for green salad for 70 people calls for 18 heads of lettuce. How many heads of lettuce would be needed for 176 people to be served?

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can you please explain this to me in step by step form so hopefully i can understand this.

log x 9/4 =2

please help me

thank you
julie I need help with story problems

Solve the problem and show solution used......In a town election the winning candidate had 220 more votes than the loser. If 810 votes were cast in all how many did each candidate receive?

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heather