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3 years ago

If f(x) = -3x^4 - 2x^3 + 3x^2 and g(x) = 3x^4 - 4x^3 + x^2 then f(x) + g(x) =

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

7 0

Answer:

c. -3×^4-6×^3+4×^3

Step-by-step explanation:

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3 years ago

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Simplify the following expresión by combining like terms: 8x +7 - 2x + y

beks73 [17]

Simplifying the expression 8x +7 - 2x + y, by combining like terms is 6x + y + 7

<h3>How to simplify an expression?</h3>

The expression have to be simplified by combining the like terms.

Like terms are terms whose variables (and their exponents such as the 2 in y²) are the same.

Therefore,

8x +7 - 2x + y

The like terms are 8x and 2x . Therefore, lets combine it.

8x - 2x + y + 7

Therefore, the simplified expression is 6x + y + 7

learn more on simplification here:brainly.com/question/13056018

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2 years ago

A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

Lelu [443]

Answer:

95% Confidence interval: (0.375,0.377)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 0.376 cc/cubic meter

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation, s = 0.0012

Degree of freedom =

$=n-1\\=15-1\\=14$

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.145$

$0.376 \pm 2.145(\dfrac{0.0012}{\sqrt{15}} )\\\\ = 0.376 \pm 0.0006\\\\ = (0.3754,0.3766)\approx (0.375,0.377)$

(0.375,0.377) is the required 95% confidence interval for the population mean potassium chloride concentration.

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3 years ago

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Step-by-step explanation:

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