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Mnenie [13.5K]
3 years ago
14

Jonah's family is ordering dinner. Each adult meal costs $8.50, each kid meal costs $6.75, and

Mathematics
1 answer:
katovenus [111]3 years ago
4 0

Answer: D. 8.50a + 6.75k + 1.75(a + k)

Step-by-step explanation:

Cost of adult meal = $8.50

Cost of kid meal = $6.75

Cost of drink = $1.75

Number of adults = a

Number of kids = k

Since everyone orders a meal and

a drink, the expression that can be used to express the total cost of the meal will be:

Cost for adults:

= (8.50 × a) + (1.75 × a)

= 8.50a + 1.75a

Cost for kids:

= (6.75 × k) + (1.75 × k)

= 6.75k + 1.75k.

To get the total cost, we add the cost for adults and kids together. This will be:

= 8.50a + 1.75a + 6.75k + 1.75k.

= 8.50a + 6.75k + 1.75a + 1.75k

= 8.50a + 6.75k + 1.75(a + k)

Therefore, the correct option is D.

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A physics class has students. Of​ these, students are physics majors and students are female. Of the physics​ majors, are female
zloy xaker [14]

Answer:

The probability that a randomly selected student is female or a physics major is <u>0.65</u>.

Step-by-step explanation:

Note: This question is not complete. A complete is therefore provided before answering the question as follows:

A physics class has 40 students. Of these, 14 students are physics majors and 18 students are female. Of the physics majors, six are female. Find the probability that a randomly selected student is female or a physics major. The probability that a randomly selected student is female or a physics major is_______.

The Step-by-step explanation is therefore provided now as follows:

The probability that a randomly selected student is female or a physics major can be calculated using the following formula:

P(PM or F) = P(PM) + P(F) - P(PMF)

Where;

P(PM or F) = Probability of student selected is Physics Major or Female = ?

P(PM) = Probability of student selected is Physics Major = Number of Physics Major / Total number of students in the Physics class = 14 / 40 = 0.35

P(F) = Probability of student selected is Female = Number of female students in the Physics class / Total number students in the Physics class = 18 / 40 = 0.45

P(PMF) = Probability of student selected is Physics Major and Female = Number Physics Major that female in the Physics class / Total number students in the Physics class = 6 / 40 = 0.15

Substituting the values into equation (1), we have:

P(PM or F) = 0.35 + 0.45 - 0.15 = 0.65

Therefore, the probability that a randomly selected student is female or a physics major is <u>0.65</u>.

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Step-by-step explanation:

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You have 15 yards of ribbon for your gift boxes. Each box gets the same amount of ribbon. How much ribbon will each of your 20 g
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15/20 = 0.75

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Based on this I would already know the answer is A.
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Answer:

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Step-by-step explanation:

Calculated based on 2 given angles and 1 given side.

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