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ValentinkaMS [17]
2 years ago
14

A restaurant customer left ​$1.80 as a tip. The tax was 8% and the tip was ​20% of the cost including tax.

Mathematics
1 answer:
PtichkaEL [24]2 years ago
8 0

Answer:The bill before tax was $8.33

Step-by-step explanation: Divide tip by portion of bill:

1.80/0.20 = 9.00

The total bill before the tip was $9.00

Divide total bill by 1+ sales tax rate:

9.00 / 1.08 = 8.33

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Answer:

(a) y=8x+5

(b) 7 hours.

Step-by-step explanation:

(a) Let x be the number of hours and y is the total cost.

We have been given that Beatrice and her friends charge $8 per hour of babysitting, so the charges for x hours of babysitting will be 8x.

As they also charge a mandatory $5 per day fee for each child for snacks, so the total charges for babysit each day will be charges for x hours of babysitting plus mandatory charge.

We can represent this information in an equation as:

y=8x+5

Therefore, the equation y=8x+5 represents the total cost of using Beatrice’s babysitting service each day.

(b) To find the number of hours Beatrice babysit the daughter, we will substitute y = 61 in our equation and solve for x.

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Let us subtract 5 from both sides of our equation.

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Expression for part c is missing.

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