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Nataly [62]
2 years ago
14

In a survey of 400 seniors, x percent said that they plan on majoring in physics. One university has used this data to estimate

the number of physics majors it expects for its entering class of 3,300 students. If the university expects 66 physics majors, what is the value of x
Mathematics
1 answer:
azamat2 years ago
8 0

Answer:

2 percent

Step-by-step explanation:

We can use two separate fractions, one representing the amount of physics majors expected and the amount of seniors expected in physics majors by the university.

\frac{400x}{66} = \frac{400}{3600}

Now cross multiply.

\frac{66*400}{400x * 3600}

x will be removed.

\frac{26400}{1320000}

Simplifying this fraction will get you \frac{1}{50}, which in percentage form, will be 2 percent.

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Read 2 more answers
Look at the triangle below which of the following represents two of the angle measures of the triangle
Gelneren [198K]

Answer:

C. 60° and 80°

Step-by-step explanation:

Sum of triangle = 180°

Therefore,

8x + 4 + 6x - 2 + 10x + 10 = 180

Add like terms

8x + 6x + 10x + 4 - 2 + 10 = 180

24x + 12 = 180

24x = 180 - 12

24x = 168

x = 168/24

x = 7

Find each measure of the angles by substitute x = 7 into each expression

8x + 4 = 8(7) + 4 = 60°

6x - 2 = 6(7) - 2 = 40°

10x + 10 = 10(7) + 10 = 80°

The answer is 60° and 80°

6 0
3 years ago
3. A bag of Jelly beans contains 12 red, 17 white and 14 black jelly beans.
Nataly_w [17]

Answer:

steps below

Step-by-step explanation:

Total = 12+17+14 = 43

Without replacement:

C(12,5) / C(43,5) = (12!/5!*7!) / (43!/5!*38!) = (12*11*10*9*8) / (43*42*41*40*39)

                          = 95040 / 115511760

                           = 0.00082

                           ≈ 0.082%

with replacement: 12/43*12/43*12/43*12/43*12/43 = 12⁵ / 43⁵

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2 years ago
jayla made five more sales calls than clark. jayla and clark made a total of 33 sales calls. how many sales calls did each make?
Anni [7]

Answer:

14 each

Step-by-step explanation:

33-5=29

28/2=14

14 each

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3 years ago
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