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3 years ago

Find the solutions of the quadratic equation 3x^2 + 9x + 17 = 0

Mathematics

1 answer:

kirill115 [55]3 years ago

8 0

Answer:

9−

285

−

285

=−1.314

285

=4.314

Step-by-step explanation:

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Determine weather the statement is true or false. Justify your answer

topjm [15]

$\begin{gathered} \cos (-\frac{7\pi}{2})=\cos (\pi+\frac{\pi}{2}) \\ \cos (-\frac{7\pi}{2})=\cos (\frac{3\pi}{2}) \end{gathered}$

As we know:

$\begin{gathered} \cos (x)=0 \\ for \\ x=\pi n-\frac{\pi}{2} \\ n\in Z \end{gathered}$

For:

$\begin{gathered} n=2 \\ x=2\pi-\frac{\pi}{2}=\frac{3\pi}{2} \\ for \\ n=-3 \\ x=-3\pi-\frac{\pi}{2}=-\frac{7\pi}{2} \end{gathered}$

Therefore:

$\begin{gathered} \cos (-\frac{7\pi}{2})=0 \\ and \\ \cos (\frac{3\pi}{2})=0 \\ so\colon \\ 0=0 \\ This_{\text{ }}is_{\text{ }}true \end{gathered}$

Therefore, the statement is true

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1 year ago

What is the absolute value of –38? A. 19 B. –19 C. 38 D. –38

GREYUIT [131]

Answer

C. 38

Explanation

The absolute value of any digit is the magnitude or its size. The negative side is not considered.

It can also be defined as the actual magnitude of a numerical value or measurement, irrespective of its relation to other values.

It is represented as; /x/.

The absolute value of -38 is /-38/.

∴ /-38/ = 38

6 0

3 years ago

Plz help asp brainliest

podryga [215]

Answer:

first you need to figure out how much is in a roll and then divide the answer you got for the first one by that number and then that should be your answer for ii, if I'm not mistaking.

Step-by-step explanation:

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3 years ago

What is the measure of the apothem , rounded to the nearest tenth of an inch ? 1.3 1.7 2.0 3.4

AURORKA [14]

Answer:B 1.7

Step-by-step explanation:

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4 years ago

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vesna_86 [32]

1. have you ever borrowed money from a friend?

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4 years ago