Which method do you prefer to use to find sums-count be tens and ones use compatible numbers or use friendly numbers and adjust? Explain why. Grade 3 math 1.4

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

Is ofat (-25, 0), (25, 0) co- (0, -15), (0, 15)?