Sonji went to a sandwich shop for lunch with 8 of her friends. part of the group ordered only a sandwich for $5, and the rest of the group ordered a combo for $8. the bill for all 9 people totaled $66.00. which system of equations represents the number of meals of each type that sonji and her friends purchased?

5x + 8y = 66, x + y = 9

Step-by-step explanation:

Let x be the number of persons who ordered only a sandwich for $ 5

and y be the number of persons who ordered a combo for $ 8.

Given,

The total persons = Sonji + His 8 friends = 9,

Thus, x + y = 9

And, the total bill = Bill of x persons + Bill of y persons

= 5x + 8y

According to the question,

Total bill = $ 66,

⇒ 5x + 8y = 66

Hence, the system of equations that shows the the number of meals of each type that Sonji and her friends purchased is,

5x + 8y = 66, x + y = 9

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.