Question

Michelle bought three golf balls and onebottle of water before starting her game.She paid $12.00 for them. After nine holes, she bought one additional golf ball and four additional bottles of water.For these she paid $9.50. How much does a bottle of water cost?

Answer 1

Answer:

$1.50

Explanation:

The information given can be modelled into the following linear system where 'G' denotes a golf ball and 'W' denotes a bottle of water.

$3G+1W=12\\1G+4W=9.50$

Solving the linear system:

$3G+1W-3G-12W=12-(3*9.50)\\1G+4W=9.50\\W=\frac{16.50}{11}\\W=\ 1.50$

Each bottle of water costs $1.50.