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3 years ago

Use the cubic model y=10x^3-12x to estimate the value of y when x=3

Mathematics

2 answers:

likoan [24]3 years ago

7 0

Y=10(3)^3-12(3)
y=270-36
y=234

ella [17]3 years ago

6 0

Answer:

The value of y = 234 when x = 3.

Step-by-step explanation:

The given model function is y = $10x^3 - 12x$

We need to find the value of y when x = 3.

So, plug in x =3, in the above function, we get

y = $10(3)^3 - 12(3)$

y = 10(27) - 36

y = 270 - 36

y = 234

So, the value of y = 234 when x = 3.

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What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from a) 5 to 11? b)2 to 8? c)10

LenKa [72]

Answer: 1/2, 1/2, 1/4

Step-by-step explanation:

To find the fraction that the hour hand turns of a clockwise revolution, we have to find how long it is going then divide by 12

Ex. a) 11 - 5 = 6, 6/12 = 1/2 so the hour hand turns by 1/2 of a clockwise revolution

b) 8 - 2 = 6, 6/12 = 1/2 so the hour hand turns by 1/2 of a clockwise revolution

c) For this, we have to convert 1 into 13 as 1 - 10 is a negative number

13 - 10 = 3, 3/12 = 1/4 so the hour hand turns by 1/4 of a clockwise revolution

4 0

2 years ago

Read 2 more answers

I NEED HELP PLEASE, THANKS :)

OLga [1]

A circle is made up of 360 degrees. Lets find the decimal form of each part of the circle.

White: 122.4/360 = 0.34

Red: 115.2/360 = 0.32

Silver: 68.4/360 = 0.19

Blue: 54/360 = 0.15

Now, solve for the car color that is not red or blue.

1 - (0.15 + 0.32)

1 - (0.47)

0.53

Therefore, the answer is C.

Best of Luck!

5 0

3 years ago

The expected activity time in PERT analysis is calculated as: the weighted average of a, m, and b, with m weighted 4 times as he

maria [59]

Answer:

$\text{the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b.}$

Step-by-step explanation:

$\text{The expected activity time in PERT analysis is calculated as:}$

$\mathbf{\dfrac{a+4m + b}{6}}$

$where;$

$\text{a = optimistic duration; }$

$\text{m = most likely duration and;}$

$\text{ b = pessimistic duration from the above formula.}$

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2 years ago

What is the equation of a line that is perpendicular to 8x+6y=-5?

masha68 [24]

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3 years ago

there are five bells which ring at interval of 4,5,12 and 15 minutes respectively at what minute those bells ring at the same ti

Rus_ich [418]

<h3>Answer: 60 minutes</h3>

=====================================================

Explanation:

Let's find the LCM of 4 and 5, which are the first two items of the list.

multiples of 4 are: 4,8,12,16,20,24,...
multiples of 5 are: 5,10,15,20,25,...

The smallest item in each list is 20, so the LCM of 4 and 5 is 20.

We can replace the "4,5" in the list "4,5,12,15" with "20". So our new list would be "20,12,15".

We then repeat the process of finding the LCM of the first two items

multiples of 20 are: 20,40,60,80,...
multiples of 12 are: 12,24,36,48,60,72,...

LCM of 20 and 12 is 60.

The list "20,12,15" condenses to "60,15".

Repeat this process of finding the LCM once more and you'll find the overall LCM is 60.

Therefore, the LCM of the entire set {4,5,12,15} is 60. This is the smallest multiple shared by all four values. Interestingly enough, the outer values pair up to multiply to 60, and so do the inner values.

4*15 = 60

5*12 = 60

The bells ring together every <u>60 minutes</u>

In other words, all of the bells ring together at the same time every hour (perhaps at the top of every hour; eg at 7:00 pm and at 8:00 pm, etc).

8 0

2 years ago