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const2013 [10]
4 years ago
6

at a bargain store, Tanya bought 4 items that each cost the same amount. Tony bought 5 items that each cost the same amount, but

each was 1.25 less than the items that Tanya bought. both Tanya and Tony paid the same amount of money. what was the individual cost of each person's items?
Mathematics
1 answer:
rjkz [21]4 years ago
5 0

1. You can call x to the cost of each one of Tanya's items and y to the cost of each one of Tony's items.

2. Based on the information given in the problem and knowing that both paid the same amount of money, you can write the following expression:

5(x-1.25)=4x

3. You must solve for x:

5x-6.25=4x\\ x=6.25

4. The total amount of money that Tanya and Tony paid was:

4x=4(6.25)=25 dollars

5. Therefore, the amount of money that Tony paid for each item was:

y=\frac{25}{5} =5 dollars

The answer is:  The individual cost of each Tanya's items is 6.25 dollars and the individual cost of each Tony's items is 5 dollars.

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The table shows the time 50 students spent on their homework.
seraphim [82]

Answer: Mean = 52.8 mins

Step-by-step explanation:

We have lapses of 30 minutes, so we can write the average for each, this means that:

0 < t < 30 can be averaged to the middle of the range: 15 min.

Doing this, we have that:

7 students 15 min

27 students 45 min

12 students 75 min

4 students 105 min.

Now we can calculate the mean:

mean = (x1*n1 + x2*n2 + ...)/N

where x1 is the amount of time 1, and n1 is the number of students associated to that time and so on. N is the total number of students

Mean = (7*15min + 27*45min + 12*75min + 4*105min)/(7 + 27 + 12 + 4)

Mean = 52.8 mins

8 0
4 years ago
The half-life of carbon 14 is years. How much would be left of an original -gram sample after 2,292 years? (To the nearest whole
lozanna [386]

Answer:

A = 0.75 gram or 1 gram

Step-by-step explanation:

The half-life of carbon 14 is years. How much would be left of an original -gram sample after 2,292 years? (To the nearest whole number).

We can use the following formula for half-life of ^{14}C to find out how much is left from the original sample after 2,292 years:  

A = A_{0}e^{-0.000124t}

where:

<em>A</em> is the amount left of an original gram sample after <em>t</em> years, and  

A_{0} is the amount present at time <em>t</em> = 0.

The half-life of  ^{14}C  is the time <em>t</em> at which the amount present is one-half the amount at time <em>t </em>= 0.

If 1 gram of  ^{14}C is present in a sample,  

 Solve for A when t = 2,292:  

Substituting A_{0}  = 1 gram into the decay equation, and we have:  

A = A_{0}e^{-0.000124t}

A = A_{0}e^{-0.000124(2,292)}

A = 0.75 g or 1 g  

6 0
3 years ago
The demand function Q and cost function C(Q) of a commodity are given by the equations \[ Q = 20 - 0{,}01P\]
BartSMP [9]

The total revenue of the function is the product of the quantity and the price

The total revenue in terms of P is TR = 20P - 0.01P^2

<h3>How to determine the total revenue?</h3>

The demand and the cost functions are given as:

Quantity function, Q = 20 - 0.01P

Cost function, C(Q)=60+6Q

The total revenue is calculated as:

TR = Q * P

Substitute Q = 20 - 0.01P in the above equation

TR = P * [20 - 0.01P]

Evaluate the product

TR = 20P - 0.01P^2

Hence, the total revenue in terms of P is TR = 20P - 0.01P^2

Read more about total revenue at:

brainly.com/question/25623677

3 0
2 years ago
Maggie has a container in the shape of a right prism . The formula for its surface area is SA = Ph + 2B solve for h.
8090 [49]

Answer:

The choose first.

h =  \frac{SA - 2B}{P}

Step-by-step explanation:

SA = Ph + 2B \\  \\ Ph = SA - 2B \\  \\ h =  \frac{SA - 2B}{P}

I hope I helped you^_^

7 0
3 years ago
Kent mixed oil and gas for his lawn mower. He mixed 8 fluid ounces of oil for every 1 gallon of gas. Which of the following stat
Reil [10]

Answer:

Step-by-step explanation:

8 0
3 years ago
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