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vodka [1.7K]
3 years ago
9

Please solve!!!!!! Thanks

Mathematics
2 answers:
Kobotan [32]3 years ago
8 0
1. 108.41 (293x37%=108.41)
2. 7.268 (79x9.2%=7.268)
3. 7.05 (44x16%=7.05)
sergiy2304 [10]3 years ago
6 0

Answer:

1st: 108.41

2nd: 7.268

3rd: 7.04

BRAINLEST PLS

Step-by-step explanation:

1st: 108.41

2nd: 7.268

3rd: 7.04

BRAINLEST PLS

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3x - y = 6<br> What is the answer
Leno4ka [110]

Step-by-step explanation:

it will be x in terms of y or vice versa

6 0
3 years ago
Read 2 more answers
At a local University, it is reported that 81% of students own a wireless device. If 5 students are selected at random, what is
Sphinxa [80]

Answer:

34.87% probability that all 5 have a wireless device

Step-by-step explanation:

For each student, there are only two possible outcomes. Either they own a wireless device, or they do not. The probability of a student owning a wireless device is independent from other students. 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.

81% of students own a wireless device.

This means that p = 0.81

If 5 students are selected at random, what is the probability that all 5 have a wireless device?

This is P(X = 5) when n = 5. So

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

P(X = 5) = C_{5,5}.(0.81)^{5}.(0.19)^{0} = 0.3487

34.87% probability that all 5 have a wireless device

5 0
3 years ago
Select the situation that can be represented by 20x
ipn [44]
You work x hours. you get 20 dollars per hour. this is a random situation, because u didn't give us choices.
3 0
3 years ago
Quadratic form to vertex form with a vertex of (-4,-1) and a y-intercept of 7
Arlecino [84]
The quadratic function in vertex form is:

y = a(x - h)^2 + k

Where:

vertex = (h, k)
Axis of symmetry: x = h

The value of “a” determines whether the graph opens up or down, and makes the parent function wider or narrower.

The value of “h” determines how far left or right the parent function is translated.

The value of “k” determines how far up or down the parent function is translated.

Now that we have these definitions, we can substitute the given values into the vertex form to solve for “a”:

Use vertex = (-4, -1) and y-intercept, (0, 7):

7 = a(0+ 4)^2 - 1
7 = a(4)^2 - 1
7 = a(16) - 1

Add 1 to both sides:

7 + 1 = a(16) - 1 + 1
8 = 16a

Divide both sides by 16 to solve for “a”:

8/16 = 16a/16
1/2 = a

Since a = 1/2 (which is positive, implying that the parabola opens upward), and the vertex occurs at point (-4, -1) as the minimum point:

The quadratic equation in vertex form is:

y = 1/2(x + 4)^2 - 1


Please mark my answers as the Brainliest, if you find my explanations/solution helpful :)

5 0
2 years ago
The radius of a right circular cylinder is increasing at the rate of 3 ft/sec, while the height is decreasing at the rate of 6 f
goblinko [34]

Answer:

\frac{dV}{dt}=-450\pi ft^3/sec

Step-by-step explanation:

Let's assume

radius of cylinder as 'r'

height of cylinder as 'h'

so, we have

\frac{dr}{dt} =3ft/sec

\frac{dh}{dt} =-6ft/sec

r=15ft

h=10ft

now, we can use volume of cylinder formula

V=\pi r^2h

we can find derivative with respect to t

\frac{dV}{dt}=2\pi r h\times\frac{dr}{dt} +\pi r^2\times \frac{dh}{dt}

now, we can plug values

\frac{dV}{dt}=2\pi (15)(10)\times3 +\pi (15)^2\times -6

now, we can simplify it

\frac{dV}{dt}=-450\pi ft^3/sec

6 0
3 years ago
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