2 years ago

An arithmetic sequence is defined by:a_1=-8a1=−8a_n=a_{n-1}+4an=an−1+4What is the 7th term of the sequence?

Mathematics

1 answer:

oksian1 [2.3K]2 years ago

5 0

Answer:

Step-by-step explanation:

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Rina8888 [55]

Answer:

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Step-by-step explanation:

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3 years ago

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Write an equation of the line that passes through (2, -3) and is perpendicular to the line y=-2x-3

Natalija [7]

Answer:

$y=\frac{1}{2} (x-2)-3$ or $y=\frac{1}{2} x-4$

Step-by-step explanation:

The perpendicular slope is the opposite-reciprocal of the original slope:

Perpendicular slope of -2 is $\frac{1}{2}$

Write the equation in point-slope form ( $y=a(x-h)+k$ ):

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3 years ago

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Help with this question

Sholpan [36]

With some simplification,

cos⁻¹(x) - 5 cos⁻¹(x) - π/3 = 2π/3

becomes

-4 cos⁻¹(x) = π

cos⁻¹(x) = -π/4

However, the inverse cosine function has a range of 0 ≤ cos⁻¹(x) ≤ π, so there are no solutions to this equation.

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3 years ago

PLEASE HELP ASAP!!! Take 2y 2 - 3y - 5 from y 3 - 6y 2 + 5y. Select the correct answer.

ss7ja [257]

Answer:

(D) y³ - 8y² +8y +5

Step-by-step explanation:

y³ - 6y²+ 5y - (2y²- 3y - 5 ) = y³ - 6y² + 5y - 2y² + 3y +5 = y³ - 8y² +8y +5

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3 years ago

Use the Pythagorean theorem to solve for x

Andre45 [30]

Answer: 15

Step-by-step explanation:

12^2 + 9^2 = 225

square root of 225 = 15

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2 years ago

An arithmetic sequence is defined by:a_1=-8a1​=−8a_n=a_{n-1}+4an​=an−1​+4What is the 7th term of the sequence?

An arithmetic sequence is defined by:a_1=-8a1=−8a_n=a_{n-1}+4an=an−1+4What is the 7th term of the sequence?