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3 years ago

2x to the fourth power + 5x squared + 3, factored

2 answers:

8 0

We want to factor:
$2x^4+5x^2+3$

This may seem tricky because of the high powers, but remember that $x^4=(x^2)^2$ . Then we can factor it as:
$2x^4+5x^2+3=(2x^2+3)(x^2+1)$

Alexeev081 [22]3 years ago

8 0

(x squared+1)(2x squared+3)

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Please help me with this please is hard

Elan Coil [88]

Answer:

1. $5

2. $38.4

Step-by-step explanation:

1) $5

2) 120/100 x 32 = $38.4

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3 years ago

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3 years ago

Find the y-intercept of the following equation. Simplify your answer. 4x + y = 7

Bogdan [553]

4x + y = 7
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using y = mx + b

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3 years ago

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Approximate the solution to the equation above using three iterations of successive approximation. Use the graph below as a star

n200080 [17]

Answer:

Step-by-step explanation:

<u>Approximate Roots of Functions:</u>

We are required to find the root of

$\displaystyle 5^{-x}+7=\ 2x+4$

Let's construct a function

$\displaystyle f(x)=\ 5^{-x}+7-2x-4$

Reducing:

$\displaystyle f(x)= 5^{-x}-2x+3$

The equation will have a solution when f(x)=0. We'll start from the approximate crossing point given in the graph (x=1.5)

$\displaystyle f(1.5)=5^{-1.5}-2(1.5)+3\ =0.089$

We'll move up on x=1.52

$\displaystyle f(1.52)=5^{-1.52}-2(1.52)+3=\ 0.046$

We are closer to the solution, let's try some more up

$\displaystyle f(1.54)=5^{-1.54}-2(1.54)+3=\ 0.0038$

This value x=1.54 is close enough to the solution of the original equation

From the options given, $\frac{25}{16}$ is the closest to our solution

$\boxed{Answer:\ x=25/16}$

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4 years ago

The failure of a circuit board interrupts work that utilizes a computing system until a new board is delivered. The delivery tim

Hatshy [7]

Answer:

The expected cost is 152

Step-by-step explanation:

Recall that since Y is uniformly distributed over the interval [1,5] we have the following probability density function for Y

$f_Y(y ) = \frac{1}{5-1} = \frac{1}{4}$ if $1\leq y \leq 5$ and 0 othewise. (To check this is the pdf, check the definition of an uniform random variable)