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Alchen [17]
3 years ago
9

What is the best estimate for 142.45 ÷ 7.4

Mathematics
2 answers:
Schach [20]3 years ago
6 0

Answer:

19.25

Step-by-step explanation:

Mice21 [21]3 years ago
4 0

Answer:

19.25

Step-by-step explanation:

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What are the zeros of the function <br> f(x)= x^2+7x−18?<br>  <br> Enter your answers in the boxes.
olga55 [171]
The zeros of the function are x=2,-9
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3 years ago
Find [5(cos 330 degrees + I sin 330 degrees)]^3
earnstyle [38]
Given a complex number in the form:
z= \rho [\cos \theta + i \sin \theta]
The nth-power of this number, z^n, can be calculated as follows:

- the modulus of z^n is equal to the nth-power of the modulus of z, while the angle of z^n is equal to n multiplied the angle of z, so:
z^n = \rho^n [\cos n\theta + i \sin n\theta ]
In our case, n=3, so z^3 is equal to
z^3 = \rho^3 [\cos 3 \theta + i \sin 3 \theta ] = (5^3) [\cos (3 \cdot 330^{\circ}) + i \sin (3 \cdot 330^{\circ}) ] (1)
And since 
3 \cdot 330^{\circ} = 990^{\circ} = 2\pi +270^{\circ}
and both sine and cosine are periodic in 2 \pi,  (1) becomes
z^3 = 125 [\cos 270^{\circ} + i \sin 270^{\circ} ]

6 0
3 years ago
The SAT mathematics scores in the state of Florida for this year are approximately normally distributed with a mean of 500 and a
Radda [10]

Answer:

The correct answer is 47.5%, or 0.475.

Step-by-step explanation:

3 0
3 years ago
What is the slope of the line represented by the equation y=- } - 5x?
Zepler [3.9K]

Answer:

The slope of the line represented by y = -5x is "-5".

Step-by-step explanation:

y=mx+b

M=slope

b=Y-intecerpt

5 0
3 years ago
Read 2 more answers
Graph the line whose x-intercept is 8 and whose y-intercept is -9.
eduard

Answer: attached image

7 0
2 years ago
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