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yuradex [85]
3 years ago
6

Alejandra spent her birthday money on a video game that cost 24$,a controller for 13$,and a memory card for 16$ . The total tax

was 3$ . Write and solve a subtraction equation to find how much money Alejandra gave the cashier if she recived 4$ in change
Mathematics
1 answer:
natita [175]3 years ago
5 0

Answer: Alejandra gave $60 to the cashier.

Step-by-step explanation:

Hi, to answer this question we have to write an equation with the information given.

We have to subtract to the amount that Alejandra paid(x) the sum of the costs of each product [videogame (24), controller (13) and memory card (169] and the total tax (3). the expression must be equal to the amount received in change.

Mathematically speaking:

x -(24+13+16+3) = 4

Solving for x:

x - 56 =4

x = 4+56

x =60

Alejandra gave $60 to the cashier.

Feel free to ask for more if needed or if you did not understand something.

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Answer:

37.27% probability that he or she will have a heart attack.

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

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Researchers discovered that 82% of people who have suffered a heart attack had periodontal disease, an inflammation of the gums.

This means that P(A|B) = 0.82

Only 33% of healthy people have this disease.

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This means that P(B) = 0.15

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P(B|A) = \frac{0.15*0.82}{0.33} = 0.3727

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6 0
3 years ago
PLEASE ANSWER QUICKLY
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