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3 years ago

Multiply 2x(4x^2+x+3)

Mathematics

1 answer:

Marina CMI [18]3 years ago

7 0

Answer:

8x^3+2x^2+6x

Step-by-step explanation:

2x(4x^2+x+3)

using distribution -

8x^3+2x^2+6x

hope this helps!!

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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3 years ago

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Sliva [168]

Answer:

Angle YXZ = (1/2) sum of the intercepted arcs

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Step-by-step explanation:

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3 years ago

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<h3>Answer is 4.1</h3>

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3 years ago

A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain star, the interval between

victus00 [196]

Answer:

a) $\frac{dB}{dt} = \frac{5\pi}{4.2} \cdot \cos \left(2\pi\cdot \frac{t}{4.2} \right)$ , b) $\frac{dB}{dt}\approx 5.595$

Step-by-step explanation:

a) The rate of change of the brightness of the Cepheid can be determined by deriving the function in time:

$\frac{dB}{dt} = \left(\frac{2\pi}{4.2} \right)\cdot 0.25\cdot \cos (2\pi\cdot \frac{t}{4.2})$

$\frac{dB}{dt} = \frac{5\pi}{4.2} \cdot \cos \left(2\pi\cdot \frac{t}{4.2} \right)$

b) The rate of increase after one day is:

$\frac{dB}{dt} = \frac{5\pi}{4.2} \cdot \left(2\pi \cdot \frac{1}{4.2} \right)$

$\frac{dB}{dt}\approx 5.595$

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3 years ago