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3 years ago

3x^2+23x+14=0 Solve for x. Show your work. ( please help )

Mathematics

2 answers:

chubhunter [2.5K]3 years ago

7 0

Answer:

-7or in fraction form -2/3

Step-by-step explanation:

Factor left side of equation.

(3x+2)(x+7)=0

Now afterwards Set factors equal to 0.

3x+2=0 or x+7=0

Igoryamba3 years ago

5 0

Answer:

x=-2/3 or x=-7

Step-by-step explanation:

equation:3x^2+23x+14=0

use quadratic formula -b+ or- √(b)^2-4ac/2a

factor left side of equation:

(3x+2)(x+7)=0

Step 2: Set factors equal to 0.

3x+2=0 or x+7=0

x= -2/3

or x=−7

hope this helps!

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Orlov [11]

Answer:

Step-by-step explanation:

Given Parameters

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Standard dev, $\sigma$ = 30

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Critical Value, $t_\alpha$ , is given by

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a).

Confidence Interval, $\mu$ , is given by the formula

$\mu = x +/- t_c \times \frac{s}{\sqrt{n} }$

$\mu = 180 +/- 1.729 \times \frac{30}{\sqrt{20} }$

$\mu = 180 +/-11.5985$

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b).

Critical Value, $t_{\alpha/2}$ , is given by

$t_{c}=t_{\alpha/2, df} = t_{0.05/2,19} = 2.093$

Confidence Interval, $\mu$ , is given by

$\mu = x +/- t_c \times \frac{s}{\sqrt{n} }$

$\mu = 180 +/- 2.093 \times \frac{30}{\sqrt{20} }$

= 180 +/- 14.0403

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8 0

3 years ago

One number is three less than another number. If their sum is 49, find the two numbers.

Vinil7 [7]

Answer:

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Step-by-step explanation:

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3 years ago

You plan to acquire a sinusoidal signal that repeats 250 microseconds. What should be the minimum sampling rate of the digital s

Phoenix [80]

Answer: F = 25.1 kHz

Step-by-step explanation:

Time (period) = 250 × 10^-6 s

Let's first calculate the folding frequency. Given by

NF (rad s-1) = π/Δt

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The original signal must be filtered by analog or physical methods to remove all frequencies higher than the Nyquist frequency before the signal is sampled or digitized.

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3 years ago

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vlabodo [156]

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3 years ago

Can someone help me with this?

Firdavs [7]

Answer:

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8 0

3 years ago