Sarah and kaylee go to the movie theater and purchase refreshments for their friends. sarah spends a total of $47.00 on 12 drinks and 1 bag of popcorn. kaylee spends a total of $81.75 on 3 drinks and 9 bags of popcorn. write a system of equations that can be used to find the price of one drink and the price of one bag of popcorn.

1 drink costs and 1 popcorn bag cost

Step-by-step explanation:

Given:

Sarah spends a total of $47.00 on 12 drinks and 1 bag of popcorn.

Kaylee spends a total of $81.75 on 3 drinks and 9 bags of popcorn

Let the price of 1 drink be x

Let the price of 1 popcorn bag be y

Sarah Spends is given by:

Kayle spends is given by:

Now putting the value of x in sarah spending equation we get

Now Substituting value of y=8 in Sarah spends equation we get

Hence 1 drink costs and 1 popcorn bag cost

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.