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4 years ago

15

A ball weighs 15 pounds on Earth and 5.7 on Mars. What is the constant proportionality between the weight of an object on Mars a

nd Earth?

1 answer:

Diano4ka-milaya [45]4 years ago

6 0

Mars is about 2.3 times less weight

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An item is regularly priced at $85. Tom bought it at a discount of 15% off the regular price

skelet666 [1.2K]

Answer:

$72.25

Step-by-step explanation:

85 x (1-.15) = answer

85 x .85 = 72.25

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3 years ago

3y-6 divided by 9 = 4-2 divided by -3

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Answer:

y = 16/9

Step-by-step explanation:

Assuming "y" is a variable

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Trig: Which complex number's graph is shown?

Andrei [34K]

ANSWER

$2 \sqrt{2} ( \cos( \frac{7\pi}{4} + i \sin( \frac{7\pi}{4} ) )$

EXPLANATION

The complex number shown has coordinates (2,-2)

or

$z = 2 - 2i$

The modulus is

$|z| = \sqrt{ {2}^{2} + {( - 2)}^{2} }$

$|z| = \sqrt{ 8} = 2 \sqrt{2}$

The argument is

$\theta= \tan^{ - 1} ( \frac{ - 2}{2} )$

$\theta= \tan^{ - 1} ( -1) = \frac{7\pi}{4}$

The polar form is

$2 \sqrt{2} ( \cos( \frac{7\pi}{4} + i \sin( \frac{7\pi}{4} ) )$

The first option is correct.

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4 years ago