Vicky makes 8 purses and 9 key rings to sell for charity. The price of a purse will be twice as much as the price of a key ring.
Vicky wants to get a total of £40 when she sells all the purses and all the key rings. Work out the price Vicky needs to charge for each purse and for each key ring.
PLEASE HELP!

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?