If you add Natalie's age and Fred's age, the result is 37 . If you add Fred's age to 4 times Natalie's age, the result is 76 . Write and solve a system of equations to find how old Fred and Natalie are.

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

Which strategy is used by public health to reduce the incidence of food poisoning?

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )