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3 years ago

A gas station charges $6.00 for a car wash. At the same gas station, gas costs

Mathematics

1 answer:

Darina [25.2K]3 years ago

7 0

12 gallons $3.75 per gallon times 12 equals 45 plus 6 which is the car wash amount it’s $51.

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Chris drove his car to the movie theater. The graph below represents Chris's speed over time, from when he left his house to whe

abruzzese [7]

Answer:

Step-by-step explanation:

Stopping at a stoplight means that Chris's speed would be zero on the graph. The times that his speed is zero are times t = 0, t = 2 min, t = 11 min, and t = 21 min. Because the graph shows his speed from the time he left his house (at t = 0) to the time he arrived at the theater (at t = 21 min), the most likely times he stopped at stoplights are times t = 2 min and t = 11 min.

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3 years ago

Please help me understand and solve this

ss7ja [257]

Step-by-step explanation:

just multiple them and you'll get the results and the results you got add them together

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3 years ago

The diameter of a new circular play space is 18 meters. How much fencing is needed to completely surround the play space?

lora16 [44]

diameter * pi = circumference

18 pi meters

6 0

3 years ago

Jay earns $8 an hour when he works at his uncle’s store. He earns $9 an hour when he does yard work for his neighbor. Which expr

algol13

Answer:

8u + 9v

Step-by-step explanation: This would be the expression that can determine how much Jay earns within a week because it expresses both kinds of income.

4 0

3 years ago

Read 2 more answers

A.The Murray family has produced 8 children.

Vlad [161]

Answer:

A. 0.2734 = 27.34% probability that there are an equal number of boys and girls

B. 0.2753 = 27.53% probability that she’ll answer exactly 5 questions correctly

Step-by-step explanation:

In each of these questions, the binomial probability distribution is used.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

A.The Murray family has produced 8 children.

What is the probability that there are an equal number of boys and girls?

8 children means that $n = 8$

Each children is equally as likely to be a boy or a girl, which means that $p = 0.5$

This probability is P(X = 4). So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 4) = C_{8,4}.(0.5)^{4}.(0.5)^{4} = 0.2734$

0.2734 = 27.34% probability that there are an equal number of boys and girls

B.Margie has the uncanny ability of being able to guess the correct answer to TRUE/FALSE questions with an 80% accuracy rate. Tomorrow’s test has 7 questions on it and she needs to answer 5 questions correctly in order to make the Honor Roll. If she guesses on every question, what is the probability that she’ll answer exactly 5 questions correctly?

80% accurracy rate means that $p = 0.8$

7 questions means that $n = 7$

The probability is P(X = 5). So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 5) = C_{7,5}.(0.8)^{5}.(0.2)^{2} = 0.2753$

0.2753 = 27.53% probability that she’ll answer exactly 5 questions correctly

7 0

3 years ago