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worty [1.4K]
3 years ago
15

The expression. 3(5^2 +2x+4)-4(4x^2 +2x+3) equals?

Mathematics
1 answer:
crimeas [40]3 years ago
8 0

Answer:

- x^2 - 2x

Step-by-step explanation:

3 ( 5x^2 + 4 + 2x) - 16x^2 -8x -12

15 x^2 + 12 + 6x - 16x^2 - 8x - 12

-x^2 - 2x

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Answer all for BRAINLIEST!!! And lots of points ASAP
Arlecino [84]

Answer:

Here they all are!

Step-by-step explanation:

1. 722.22222222%

2. 1.3

3. 8%

4. 587%

5.  4377/5000

6. 0.07

7. 100%

8.  82.608695652174

9. 3.2598

10. 2500%

11. 99

12. 48.6

4 0
3 years ago
Read 2 more answers
A starter motor used in a space vehicle has a high rate of reliability and was reputed to start on any given occasion with proba
GuDViN [60]

Answer:

0.095163

Step-by-step explanation:

given that a starter motor used in a space vehicle has a high rate of reliability and was reputed to start on any given occasion with probability .99999

Here we find that for any start, there are exactly two outcomes either success or failure.

Also each start is independent of the other since p = 0.99999 for succss is given constant.

Thus X no of successes is binomial with p = 0.99999 and n =10000

If Y is taken as failure then Y is binomial with p' = 0.00001 and n =10000

Required probability

= the probability of at least one failure in the next 10,000 starts

= 1-P(no failure in 10000 starts)

=1-(0.99999)^{10000} \\=0.095163

4 0
4 years ago
Help please! Suppose f(x) = x². What is the graph of g(x)= ⅓f(x)
horrorfan [7]

The graph of the function, g(x) = 1/3 f(x), is shown below. The correct option is A

<h3>Graph of functions </h3>

From the question, we are to determine the graph of the given function

The function we are to determine its graph is

g(x) = 1/3 f(x)

From the given information,

f(x) = x²

Thus,

We are to determine the graph of

g(x) = 1/3 x²

First, we will determine some points on the given function

Find g(x) when x = -3

g(x) = 1/3 x²

g(x) = 1/3 (-3)²

g(x) = 1/3 × 9

g(x) = 3

Find g(x) when x = 0

g(x) = 1/3 x²

g(x) = 1/3 (0)²

g(x) = 1/3 × 0

g(x) = 0

Find g(x) when x = 3

g(x) = 1/3 x²

g(x) = 1/3 (3)²

g(x) = 1/3 × 9

g(x) = 3

Using the points above, the graph of the function is shown below

Learn more on Graph of functions here: brainly.com/question/9525508

#SPJ1

3 0
1 year ago
Plutonium-240 decays according to the function Q(t)=Q(subscripto)e^(-kt) where Q represents the quantity remaining after t years
svetoff [14.1K]
<span>The answer is 9,990 years. Using the exponential decay question, we can figure out how long it will take Plutonium-240 to decay from 27 grams to 9 grams. Setting the equation up looks like this, 9 = 27 e^ (-0.00011 t). From this you get, 0.333333 = e ^(-0.00011 t). Next, you simplify by dividing both sides by the natural log, -1.0986 = -0.00011 t. Finally, you solve by dividing both sides by -0.00011, giving 9,987 years for t, rounded up to 9,990 years.</span>
7 0
4 years ago
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Who can answer this? I’ll mark brainliest!!
Vesna [10]

Answer:

y = 0.48(x - 0.5)² - 3

y = 0.48(x² - x - 6)

Step-by-step explanation:

From the graph the zeros are

x = {-2, 3}

The x coordinate of the vertex is the midpoint of the roots

x = (-2 + 3) / 2

x = 0.5

The y coordinate of the vertex is

y = -3

vertex = (0.5, -3)

--------------------------------------

Merhod I - vertex

Vertex form is

y = a(x - h)² + k

plug in the vertex

y = a(x - 0.5)² - 3

to find a plug in either root

using x = 3

0 = a(3 - 0.5)² - 3

0 = a(2.5)² - 3

0 = 6.25a - 3

3 = 6.25a

a = 3/6.25

a = 0.48

y = 0.48(x - 0.5)² - 3

-----------------------------

Method II - roots

y = a(x + 2)(x - 3)

-3 = a(0.5 + 2)(0.5 - 3)

-3 = a(2.5)(-2.5)

-3 = -6.25a

3/6.25 = a

0.48 = a

y = 0.48(x + 2)(x - 3)

Expand

y = 0.48(x² - x - 6)

5 0
3 years ago
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