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garri49 [273]
3 years ago
11

NEED HELP!!?? 40 pts See attached image (Pre-Cal)

Mathematics
1 answer:
Naya [18.7K]3 years ago
7 0

Answer:

8(cos(π) +i·sin(π))

Step-by-step explanation:

The number in parentheses has a magnitude of ...

√(1^2 +(√3)^2) = √4 = 2

Then the cube of that number will have a magnitude of 8, eliminating the 2nd and 4th choices

The angle of the number in parentheses is ...

arctan(-√3/1) = -π/3

Then 3 times that angle will be -π, also π.

The number of interest has a magnitude of 8 and an angle of π, so is written in the desired form as ...

8(cos(π) +i·sin(π)) . . . . . matches the 3rd choice

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Translate each sentence into an equation
Mazyrski [523]

Answer:

1. X/2 = 4

2. 3x - 2 = 11

3. 2x - 5 = 15

4. 2x-1=12

5. 9x = 2(x+5)

Step-by-step explanation:

8 0
3 years ago
Eighty percent of one store’s customers paid with credit cards. Forty customers came in that day. How many customers paid for th
Yuri [45]

Answer:

32

Step-by-step explanation:

40 = 100%

how many are 80% ?

well, 80% = 80× 1%

1% = 100% / 100

so, in our case

80% = 80×40/100 = 8×4 = 32

as a shortcut you consider a percentage x as a ratio factor of x/100 you multiply the 100% number with.

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3 0
3 years ago
Plz help ill give brainlist to you
Lelu [443]
0.4% of $4,800 is $19.2, otherwise written as $19.20 in terms of money, apparently. This is based off the calculations of a calculator, though if you prefer to do the rough work, be my guest. The work for finding it on raw work is below.

(EX.) EQUATION : y = p% × x
EQUATION : y = 0.4% 
× 4800

To make this work, you gotta convert that percent into a decimal, by dividing the percentage by 100. 0.4 ÷ 100 = 0.004

EQUATION : y = 0.004 
× 4800.

Once you multiply them, you get : 19.2 (otherwise known as $19.20)
6 0
4 years ago
If efg= hjk complete each part
icang [17]

Answer:

I this that I is missing in it so the answer is I

3 0
3 years ago
Find the measure of angle Z
ira [324]

Answer:

∠Z ≈ 12°

Step-by-step explanation:

Using the Sine Rule in ΔXYZ

\frac{x}{sinx} = \frac{z}{sinz}, that is

\frac{48}{sin96} = \frac{10}{sinz} ( cross- multiply )

48 × sinZ = 10 × sin96° ( divide both sides by 48 )

sinZ = \frac{10sin96}{48}

Z = sin^{-1} ( \frac{10sin96}{48} ) ≈ 12°

8 0
4 years ago
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