Harrison uses a gift card to buy only coffee at at a coffee shop. The gift card starts out with $20. The function y = 20 - 2x represents the amount of money (y) still left on the gift card after purchasing(x) cups of coffee. Identify the x-intercept and describe its meaning in this scenario.

x-intercept is 10.  It means when you buy 10 cups of coffee you run out of money

Step-by-step explanation:

The x-intercept happens when y = 0

so

0 = 20 - 2x

solving for x we get  

2x = 20

x = 10

so when you buy 10 cups of coffee you run out of money

m a t h w a y. c o m

step-by-step explanation:

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%