Mrs Newton's savings drop in value by 40% in the first year, fall by 40% in the second year and increase by 80% in the third year. (i) She starts with £100. How much are her savings worth after three years?

₤100

Step-by-step explanation:

In the first two years the savings dropped a total of 80% and in the third year rebounded back 80% which would level it out.

tickets for the harlem globetrotters

show at michigan state university in

2010 cost $16, $23, or, for vip seats, $40.

total revenue = 16x + 23y + 40z

if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, sales of all three kinds of tickets would

total $46,575.

16x + 23y + 40z = 46575, how many of each kind of ticket would

have been sold?

solve for x, y and z

x − 9z = 0

x − y − z = 55

16x + 23y + 40z = 46575

x = 1170

y = 985

z = 130

welcome!

3

step-by-step explanation: