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777dan777 [17]
3 years ago
14

A student is trying to solve the system of two equations given below:

Mathematics
2 answers:
lora16 [44]3 years ago
8 0
I would say B. By multiplying the first equation by -5, you create -5y. If you add that to the second equation, your cancelling out the 5y term, and get a new equation with only z and a constant.
grigory [225]3 years ago
5 0

Answer:

the answer is B

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Please help and thank you so much in advanced
sdas [7]

x=18

y=-6

To find the x intercept, you would substitute the y with 0 and then solve for x.

To find the y intercept, you would substitute the x with 0 and solve for y.

Hope this helps braniliest please!

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Explain how to use friendly percents to find 35% of 80.
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26 is 80% of what number
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5 0
3 years ago
The altitude A in feet of a plane t minutes after takeoff is approximated by the function a=7000 In(0.2t)+2000. Solve for the t
konstantin123 [22]

Answer:

t=  \frac{1}{0.2} e^{\frac{A-2000}{7000}} = 5e^{\frac{A-2000}{7000}}

And for this case we can use the last equation when we want the altitude and we want to know how many minutes the plane was at air after the takeoff

Step-by-step explanation:

For this case we have the following function given :

A = 7000 ln(0.2 t) +2000

Where:

A = feet of a plane and t = minutes after takeoff

And we are interested to solve t in terms of A

We can begin subtracting 2000 in both sides of the equation and we got:

A-2000 = 7000 ln (0.2t)

Now we can divide both sides by 7000 and we got:

\frac{A-2000}{7000} = ln(0.2 t)

Now we can apply exponential in both sides of the equation and we got:

e^{\frac{A-2000}{7000}}= 0.2 t

And now we can divide both sides by 0.2 and we got:

t=  \frac{1}{0.2} e^{\frac{A-2000}{7000}} = 5e^{\frac{A-2000}{7000}}

And for this case we can use the last equation when we want the altitude and we want to know how many minutes the plane was at air after the takeoff

4 0
2 years ago
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