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Ostrovityanka [42]
3 years ago
13

An electrician charges $50 for the first hour and $5.50 for each additional hour. Write an equation to represent the amount the

electrician will earn
Mathematics
1 answer:
sesenic [268]3 years ago
6 0

Answer:

50+5.50x

Step-by-step explanation:

I really hope this helps.

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The sum of two numbers is 18 their difference is 8
hram777 [196]

<em><u></u></em>

<em><u>Answer:</u></em>

<em><u></u></em>

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<em><u>13 and 5</u></em>

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<em><u>Step-by-step explanation:</u></em>

<em><u></u></em>

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<em><u>x+y=18</u></em>

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<em><u>x-y=8</u></em>

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<em><u></u></em>

<em><u>_____</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>2x=26</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>x=13</u></em>

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<em><u></u></em>

<em><u>So the first number must be 13</u></em>

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<em><u></u></em>

<em><u>13+y=18</u></em>

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<em><u></u></em>

<em><u>y=5</u></em>

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<u><em>And the second number must be 5</em></u>

3 0
3 years ago
Read 2 more answers
A rectangle has a length that is 12 ft longer
Reil [10]
4x+24=84 4x=60 x=15 length =27 width = 15
7 0
3 years ago
Hello can you help me the question is:write two equivalent fractions?
MakcuM [25]

Answer:

Step-by-step explanation:

1)8/12=12/18

2)12/20=18/30

3)4/16=6/24

6 0
3 years ago
Which equivalent fractions can you use to find the difference of 5 and 3/12 and 1 and 4/9
Gala2k [10]

For 5-3/12 the equivalent expression is 60/12-3/12 And then for 1-4/9 the equivalent expression 9/9-4/9

4 0
3 years ago
(7 + 7i)(2 − 2i)
Ostrovityanka [42]

The complex number  -7i into trigonometric form is 7 (cos (90) + sin (90) i) and  3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

<h3>What is a complex number?</h3>

It is defined as the number which can be written as x+iy where x is the real number or real part of the complex number and y is the imaginary part of the complex number and i is the iota which is nothing but a square root of -1.

We have a complex number shown in the picture:

-7i(3 + 3i)

= -7i

In trigonometric form:

z = 7 (cos (90) + sin (90) i)

= 3 + 3i

z = 4.2426 (cos (45) + sin (45) i)

\rm 7\:\left(cos\:\left(90\right)\:+\:sin\:\left(90\right)\:i\right)4.2426\:\left(cos\:\left(45\right)\:+\:sin\:\left(45\right)\:i\right)

\rm =7\left(\cos \left(\dfrac{\pi }{2}\right)+\sin \left(\dfrac{\pi }{2}\right)i\right)\cdot \:4.2426\left(\cos \left(\dfrac{\pi }{4}\right)+\sin \left(\dfrac{\pi }{4}\right)i\right)

\rm 7\cdot \dfrac{21213}{5000}e^{i\dfrac{\pi }{2}}e^{i\dfrac{\pi }{4}}

\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}

=21-21i

After converting into the exponential form:

\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}

From part (b) and part (c) both results are the same.

Thus, the complex number  -7i into trigonometric form is 7 (cos (90) + sin (90) i) and  3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

Learn more about the complex number here:

brainly.com/question/10251853

#SPJ1

3 0
2 years ago
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