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Natalka [10]
3 years ago
9

The product of (3 + 2i) and a complex number is (17 + 7i).

Mathematics
1 answer:
Ann [662]3 years ago
3 0
I= -1



<span>for more information

</span> https://answers.yahoo.com/question/index;_ylt=A0LEVvfuKZ5YRFsAlWIPxQt.;_ylu=X3oDMTBybGY3bmpvBGNvbG8D...

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The credit remaining on a phone card (in dollors) is a linear function of the total calling trime made with the card ( in minute
KATRIN_1 [288]

After 85 minutes of calls, there are $27.25 left on the card.

<h3>What is the remaining credit after 85 minutes of calls?</h3>

A linear equation in slope-intercept form is:

y = a*x + b

Where a is the slope.

If the line passes through two points (x₁, y₁) and (x₂, y₂) the slope is:

a = \frac{y_2 - y_1}{x_2 - x_1}

In this case, we know that the line passes through the points (22, 36.7) and (52, 32,20)

(points of the form (time, dollars)).

So the slope is:

a = \frac{32.2 - 36.7}{52 -22} = -0.15

The linear equation is then:

y = -0.15*x + b

To find the value of b, we use the point (22. 36.7)

36.7 = -0.15*22 + b

36.7 + 0.15*22 = b = 40

Then the linear equation is:

y = -0.15*x +40

The amount remaining in the credit card after 85 minutes is given by evaluating the above equation in x = 85.

y = -0.15*85 + 40 = 27.25

This means that after 85 minutes of calls, there are $27.25 left on the card.

If you want to learn more about linear equations:

brainly.com/question/1884491

#SPJ1

7 0
1 year ago
Bargains r us store offers a 12 roll package of wipey wonder toilet paper for $2.59.The 6 roll package is on sale for $1.25.Whic
lawyer [7]
$1.25 because if you bought 2 packs of them it would be $2.50 so you would be 0.09 cheaper
3 0
2 years ago
10x +7 = -3х – 3 help guys
Pepsi [2]

Answer:

x = -10/13

Step-by-step explanation:

10x + 7 = -3x - 3

Add 3x to both sides

10x + 3x + 7 = -3x + 3x - 3

13x + 7 = 0x - 3

13x + 7 = -3

Subtract 7 from both sides

13x + 7 - 7 = -3 - 7

13x + 0 = -10

13x = -10

Divide both sides by 13

13x ÷ 13 = -10 ÷ 13

1x = -10/13

x = -10/13

6 0
2 years ago
Express the area of a rectangle with length 7ab and width 2a as a monomial.
Lady_Fox [76]
Area of a rectangle is length * width.

7ab * 2a is the same as 7(2) * a(a) * b

7 * 2 = 14
a * a = a²
b = b

Put it all together. 

14a²b is your monomial. 
5 0
3 years ago
Round 368cm to the nearest meter
Bogdan [553]
4 metres hihiihiihiihihiihihiihiihihiihihiihiihiihiihihiihihiihiihi

4 0
3 years ago
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