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oksano4ka [1.4K]
4 years ago
14

I need help please

Mathematics
1 answer:
Alborosie4 years ago
4 0

Answer:

680=40m-3

Step-by-step explanation:

We know that he DOES spend $680, so we can put (680 = )

40 per month would be 40 times how many months total. Since we don't know how many months, we can use (40m)

3 months free simply means that he doesn't have to pay that price so we can take 3 months out of his total (- 3)

<em>Hope this helps!!</em>

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If i= <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B%20-%201%7D%20" id="TexFormula1" title=" \sqrt{ - 1} " alt=" \sqrt{ - 1
Ksivusya [100]

Answer:

.......the answer is -1

3 0
3 years ago
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Help a crackhead out
Natasha2012 [34]
T=5w

T= total cost 
W= weeks 
 
It can't be W= because the question is asking for total cost in dollars, so two options are cancelled out.

Can't be t=5+w because it's 5 per week and if, let's say calculating dollars for 2 weeks, the answer would be t=5+2=7 and that wouldn't be right 
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3 years ago
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what is [(7 raised to -1 - 8 raised to -1) whole raised to -1] -[(3 raised to -1 - 4 raised to -1) whole raised to -1] pls say f
soldier1979 [14.2K]

Step-by-step explanation:

7 raised to -1 - 8 raised to -1 whole raised to -1 is 56

3 raised to -1 - 4 raised to -1 whole raised to -1 is 12

8 0
3 years ago
PLEASE HELP!!! WILL MARK AS BRAINLIEST!!!
kipiarov [429]

Answer:

y = 300 (2)^x

Where x represent the number of period of times of 22 minutes. If we want to know the value of the population after 66 minutes we need to find the value of x on this way:

x = 66 minutes *\frac{1period}{22 minutes}= 3

So then we need to replace the value of x =3 and we got:

y= 300 (2)^3 = 2400

Step-by-step explanation:

For this case we have the following function:

y = 300 (2)^x

Where x represent the number of period of times of 22 minutes. If we want to know the value of the population after 66 minutes we need to find the value of x on this way:

x = 66 minutes *\frac{1period}{22 minutes}= 3

So then we need to replace the value of x =3 and we got:

y= 300 (2)^3 = 2400

7 0
3 years ago
Which is equivalent to the following expression? (2x^2+4xy-y^2)+(x^2+3xy-y^2)
masya89 [10]

annswer:

−

80


Explanation:

2

(

2

)

2

+

[

3

(

2

)

(

−

4

)

]

−

4

(

−

4

)

2


2

(

4

)

+

[

−

24

]

−

4

(

16

)


8

−

24

−

64

=

8

−

88

=

−

80


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