3 years ago

7. Find the complex conjugate of 3i+4.

Mathematics

1 answer:

Jet001 [13]3 years ago

5 0

4-3i is the complex conjugate

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A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the

lora16 [44]

Answer:

The maximum amount of profit the company can make is $854.08

Step-by-step explanation:

Let

x ----> the selling price of each widget

y ---> the amount of profit

we have

$y=-3x^{2} +155x-1148$

This is the equation of a vertical parabola open downward (because the leading coefficient is negative)

The vertex represent a maximum

The y-coordinate of the vertex represent the maximum amount of profit the company can make

using a graphing tool

Find out the vertex of the quadratic equation

The vertex is the point (25.83,854.08)

see the attached figure

The y-coordinate of the vertex is 854.08

therefore

The maximum amount of profit the company can make is $854.08

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3 years ago

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Riley is saving up to buy a new television. She needs a total of $968.58. Riley has saved $200.78 already and earns $76.78 per w

attashe74 [19]

968.58=200.78+76.78w
-200.78
767.8=76.78w
/76.78
=10w
Riley must save for 10 weeks

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3 years ago

Evaluate the following algebraic expression, if (x = 5, y = 3)<br> x² +9y - 5

gladu [14]

Answer: 47

Step-by-step explanation:

simply substitute the constants with 5 and 3.

(5)^2 + 9(3) - 5 = 47

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What is the slope of a line perpendicular to the line with a slope of 1/2

frosja888 [35]

Answer:

-2

Step-by-step explanation:

To answer this, just take the negative reciprocal of 1/2. We obtain -2.

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Which expression is equivalent to -2.1 + (-5.9) + (-3.7)?

devlian [24]

I think the best answer would be (A) (2.1+5.9+3.7) but the only difference is that one is negative an the other is positive

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3 years ago