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Hitman42 [59]
4 years ago
5

In professor shannon's economics class there are 12 male students. females represent 60% of the class total. how many students d

oes professor shannon have in his economics class?
Mathematics
2 answers:
ch4aika [34]4 years ago
7 0

Answer:

There are total 30 students in the class.

Step-by-step explanation:

Let the total number of students in class = x

Number of males in the class = 12

Number of females in the class = 60% of Total students = 60% of x = 0.6x

So, we get that,

Number of males + Number of females = Total students

i.e. 12+0.6x=x

i.e. 12=x-0.6x

i.e. 12=0.4x

i.e. x=\frac{12}{0.4}

i.e. x = 30

Thus, there are total 30 students in the class.

Mekhanik [1.2K]4 years ago
6 0
He has 30 students in his class because 40% of the class is boys and there is 2.5 40% in 100% so we do 12 x 2.5

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amm1812

Answer:

$6.96

Step-by-step explanation:

(4*8.99) + (3*7)

35.96 + 21 = 56.96

50- 56.96 =  -6.96   So she owes 6.96

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3 years ago
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makkiz [27]

Answer:

c = 8.7 inches

Step-by-step explanation:

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Substitute in the known values for a and b (the order doesn't matter):

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multiply 4.8 times itself, 7.3 times itself:

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Now find the square root of both sides of the equation (square root of c^2 = c):

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3 0
3 years ago
Which is the graph of f(x) = StartRoot x EndRoot?
Bingel [31]

The equation of the graph of f(x) = \sqrt x is (d) on a coordinate plane, an absolute value graph starts at (0, 0) and goes up through (4, 2).

The equation of the graph is represented as:

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See attachment for the graph of f(x) = \sqrt x

From the attached graph, the curve passes through points (0,0) and (4,2).

Hence, the equation of the graph of f(x) = \sqrt x is (d)

Read more about graphs and functions at:

brainly.com/question/3939432

8 0
3 years ago
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What are the zeros of the quadratic function?<br> y = x^2 - 2x - 15
Pie

Answer:

x=\frac{1+\sqrt{31}}{2},\:x=\frac{1-\sqrt{31}}{2}

Step-by-step explanation:

-> 0=2x^2-2x-15

-zeros means the solution aka x intercept, meaning y=0

x_{1,\:2}=\frac{-\left(-2\right)\pm \sqrt{\left(-2\right)^2-4\cdot \:2\left(-15\right)}}{2\cdot \:2}

=> according to quadratic formula

x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

where ax^2+bx+c=0

=> x_{1,\:2}=\frac{-\left(-2\right)\pm \:2\sqrt{31}}{2\cdot \:2}

simplify

x_1=\frac{-\left(-2\right)+2\sqrt{31}}{2\cdot \:2},\:x_2=\frac{-\left(-2\right)-2\sqrt{31}}{2\cdot \:2}

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Cannot simplify farther

3 0
3 years ago
an oil company conducts a geological study that indicates that an exploratory oil well should have a 20% chance of striking oil.
bazaltina [42]

Answer:

4.92% probability that the third strike comes on the seventh well drilled

Step-by-step explanation:

For each drill, there are only two possible outcomes. Either it is a strike, or it is not. Each drill is independent of other drills. So we use the binomial probability distribution to solve this question.

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.

20% chance of striking oil.

This means that p = 0.2

What is that probability that the third strike comes on the seventh well drilled

2 stikers during the first 6 drills(P(X = 2) when n = 6)[/tex]

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P = 0.2P(X = 2)

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