2 years ago

Solve the formula x-2y=15 for y

Mathematics

1 answer:

umka2103 [35]2 years ago

4 0

Answer:

y = (1/2)x - (15/2)

Step-by-step explanation:

goal: to rearrange the expression such that it is in the form

y = f(x); where f(x) is an expression in terms of x

given:

x - 2y = 15 (subtract x from both sides)

-2y = 15 - x (multiply both sides by -1 to make left side positive)

2y = -15 + x (divide both sides by 2 and rearrange)

y = (1/2)x - (15/2)

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Citrus2011 [14]

Answer:

$a_{61}=-972$

Step-by-step explanation:

Arithmetic Sequences

The arithmetic sequences are identified because any term n is obtained by adding or subtracting a fixed number to the previous term. That number is called the common difference.

The equation to calculate the nth term of an arithmetic sequence is:

$a_n=a_1+(n-1)r$

Where

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a1 = first term

r = common difference

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We are given the first terms of a sequence:

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Find the common difference by subtracting consecutive terms:

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The first term is a1 = -12. Now we calculate the term n=61:

$a_{61}=-12+(61-1)(-16)$

$a_{61}=-12-60*16=-12-960$

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