If y = 2x + 4, find x when y = -16.*
2 answers:
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Answer:
(a)
(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:
Therefore, the equation 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.
Let us subtract 5 from both sides of our equation.
Let us divide both sides of our equation by 8.
Therefore, Beatrice babysit 7 hours the daughter.
Expression for part c is missing.
A vendor is selling championship t-shirts for $33.00. After a day, sales were so good, they raised the selling price by 25%. The amount of percent increase on the t-shirts is $41.25
The selling price is the price at which a good is being sold to a customer.
Given that:
- The vendor sells championship t-shirts for = $33.00
- After a day the selling price increased by 25%
The amount of the percent increase on the t-shirts after a day can be estimated as:
= $8.25
Now, after a day, the vendor sold the cloth at the rate of:
= $33.00 + $8.25
= $41.25
Therefore, we can conclude that after a day, the t-shirts is being sold for $41.25 after raising the percentage by 25%.
Learn more about selling price here: