4 years ago

Using elimination to solve the system 2x + y = 8 and x + y = 4, which of the following could be the first step?

1 answer:

4 0

Answer: the option A.

The elimination method consist is adding the two equations in a way that one variable be eliminated..

In order to do that you might have to manipulate on of the equations prior to add the two equations.

In this case, ff you multiply the second equation by - 1 you will get

- x - y = - 4

which you can add to the first equation

2x + y = 8 to eliminate the y.

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A leprechaun places a magic penny under a girl's pillow. The next night there are 2 magic pennies under her pillow. Each night

11Alexandr11 [23.1K]

Answer:

tn = 2097152 pennies
tn = 20971.52 dollars.

Step-by-step explanation:

A surprisingly large amount of money.

The question is "Does the amount of money just double or do the previous amounts add to the present amount?"

I think it just doubles. Not only that, but she can't spend any of it until night 22 is reached.

tn = a*2^(n - 1)
a = 1 She starts with 1 penny.
n = 22
tn = 1*2^(22 - 1)
tn = 1*2^21
tn = 2097152 pennies
tn = 20971.52 dollars.

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SpyIntel [72]

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Step-by-step explanation:

IFNDKS

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3 years ago

$10000 in an account paying 8% compounded annually. how much will the account be worth in 18 years

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Read 2 more answers