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2 years ago

Using the substitution method to solve the system. 5x+2y=5 x=3y-16

2 answers:

8 0

5x+2y=5
x=3y-16
5(3y-16)+2y=5
15y-80+2y=5 collect the like terms
15y+2y=5+80
17y=85 divide both sides by 17
y=5

5x+2(5)=5
5x+10=5
5x=-5
x=-1
so x=-1 and y=5

seropon [69]2 years ago

6 0

5x + 2y = 5
Since, x = 3y - 16
Therefore,
5(3y - 16) + 2y = 5
15y - 80 +2y = 5
17y = 85
y = 5
therefore,
x = -1
y = 5

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KATRIN_1 [288]

Answer:

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Step-by-step explanation:

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Repeat the steps and you will reach a point where no further division is possible.

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2 years ago

If n^-2 = 1/16, then n could be which of the following?

Zepler [3.9K]

Answer:

The correct choice is

$\boxed{n=4}$

Step-by-step explanation:

The given equation is

$n^{-2}=\frac{1}{16}$

We rewrite the left hand side of the equation as a power(a number to a given exponent.

$n^{-2}=\frac{1}{4^2}$

Recall that;

$\frac{1}{a^m}=a^{-m}$

We apply this property to obtain;

$n^{-2}=4^{-2}$

Since the exponents are the same, the bases are also the same.

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3 years ago

Read 2 more answers

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aivan3 [116]

Answer:

820

Step-by-step explanation:

If you use order of operations, you can find that 3x0 and 1x400x100x456x0 is just 0 so you just have to add 2x2 and 34x24. Which is 820

order of operations is

GEMDAS

Grouping symbols

exponents

multiplication and division (these don't have to be in order)

Addition and Subtraction (again, these don't have to be in order)

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2 years ago

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Answer:

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