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valentina_108 [34]
3 years ago
7

⚡️⚡️help please ASAP ‼️

Mathematics
1 answer:
IceJOKER [234]3 years ago
4 0
 the answer is the fourth one 


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A furniture store bought a couch for $425 and marked the price up by 70%. Angela bought the couch with a 6% tax. How much did An
Tomtit [17]

Answer:Angela paid 679,05 for the couch

Step-by-step explanation:

 425*70/100=29.750

29.750/100= 297,5

297,5+425=722,5

722,5*6/100=4.335/100=43,45

722,5-43,45=679,05

8 0
3 years ago
Read 2 more answers
Prove Euler's identity using Euler's formula.<br> e^ix = cos x + i sin x
Korolek [52]

First list all the terms out.

e^ix = 1 + ix/1! + (ix)^2/2! + (ix)^3/3! ...

Then, we can expand them.

e^ix = 1 + ix/1! + i^2x^2/2! + i^3x^3/3!...

Then, we can use the rules of raising i to a power.

e^ix = 1 + ix - x^2/2! - ix^3/3!...

Then, we can sort all the real and imaginary terms.

e^ix = (1 - x^2/2!...) + i(x - x^3/3!...)

We can simplify this.

e^ix = cos x + i sin x

This is Euler's Formula.

What happens if we put in pi?

x = pi

e^i*pi = cos(pi) + i sin(pi)

cos(pi) = -1

i sin(pi) = 0

e^i*pi = -1 OR e^i*pi + 1 = 0

That is Euler's identity.

3 0
3 years ago
Rico spent $44 on 8 toy cars. If each toy car cost the same amount of money, how much did each car cost?
bagirrra123 [75]

Answer:

$5.5

Step-by-step explanation:

Divide 44 into 5 to get what each car costs!

6 0
2 years ago
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Solve h for -9h-15=93
Lerok [7]
The answer to this question:

h=-12
8 0
2 years ago
Write the equation of the line that passes through (0,3) and (-4,-1).
BlackZzzverrR [31]

Answer:

number 1

Step-by-step explanation:

if you'd look at Number One X is negative and if you look at the two number problems the x that is negative is negative for and then the one that is positive is the Y which is 3

3 0
3 years ago
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