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2 years ago

You can simplified

-3} " align="absmiddle" class="latex-formula"> ?

Mathematics

1 answer:

marin [14]2 years ago

6 0

(2√3 - 2√-3) + (√12 - √-12)
=2√3-2√3i+2√3-2√3i
=4√3-4√3i

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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:

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

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

4 0

2 years ago

Please help anyone 50 points to whom ever answers

lys-0071 [83]

Answer:

1: 80 (Vertical angles congruent)

2: 70 (Vertical angles congruent)

4: 110 (Straight angle w/ angle 2, 180-70 {known variable})

5: 90 (Right angle)

6: 90 (Right angle)

7: 20 (180-90-70 (unmarked angle opposite 4)

10:

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2 years ago

Ahmed is taking orders for lunch. A slice of pizza cost $2.1 and a chicken sandwich costs $3.1. He collects $22.8 for the group

noname [10]

X=2
y=6

x+y=8
2.1x+3.1y=22.8

7 0

2 years ago

Pls answer fast will give brainlest

Lunna [17]

Answer:

Step-by-step explanation:

7(2.8(4.2))/2=41.16m^3

14(6(7(6.1).5))=1793.4cm^3

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2 years ago

What are these closer to 1/2,0,or 1: 5/6 7/13 3/5

den301095 [7]

$\frac{5}{6}$ is closest to 1

$\frac{7}{13}$ is closest to $\frac{1}{2}$

$\frac{3}{5}$ is closest to $\frac{1}{2}$

3 0

2 years ago

Read 2 more answers