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3 years ago

? Question

Mathematics

2 answers:

Delvig [45]3 years ago

5 0

Answer:

i^32=1

i^25=i

i^86=-1

i^51=-i

Step-by-step explanation:

Follow the Rule of Four of I for this,

i^1= $\sqrt{-1}$

I^2=-1

I^3=-i

I^4=1

STatiana [176]3 years ago

5 0

Answer: first one is 1

Second one is i

Third one is -1

Fourth one is -1

Step-by-step explanation:

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3 years ago

On Naomi's cell phone plan, the amount she pays each month for international text messages is proportional to the number of inte

Margaret [11]

A) The constant of proportionality in this proportional relationship is $k = \frac{y}{x}$

B) The equation to represent this proportional relationship is y = 0.2x

<em><u>Solution:</u></em>

Given that,

The amount Naomi pays each month for international text messages is proportional to the number of international texts she sends that month

Therefore,

This is a direct variation proportion

$\text{ amount paid each month } \propto \text{ number of international texts sent that month}$

Let "y" be the amount that Naomi pays each month

Let "x" be the number of international texts she sends that month

Therefore,

$y \propto x$

y = kx -------- eqn 1

Where, "k" is the constant of proportionality

Thus the constant of proportionality in this proportional relationship is:

$k = \frac{y}{x}$

Last month, she paid $3.20 for 16 international texts

Therefore,

y = 3.20

x = 16

Thus from eqn 1,

$3.20 = k \times 16\\\\k = \frac{3.20}{16}\\\\k = 0.2$

Substitute k = 0.2 in eqn 1

y = 0.2x

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4 years ago

Walmart sell toothbrushes for 3.50 a pack but only pays 1.15 for them.What is the markup rate based on selling price?(answer Qui

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Answer:

2.45

Step-by-step explanation:

3.50

3-1= 2

50-15= 45

3.50 -1.15= 2.45

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3 years ago