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2 years ago

What is the 13th term in the arithmetic sequence described by this explicit formula? a(n) = 84 + (n – 1)(–6)

Mathematics

1 answer:

Vinvika [58]2 years ago

5 0

Answer:

Step-by-step explanation:

Just place 13 instead of n.

a(13) = 84 + (13 - 1)(-6)

= 84 + (12)(-6)

= 84 + (-72)

= 84 - 72

= 12(Answer)

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otez555 [7]

Answer:

Step-by-step explanation:

(5y+4+3x)(5y+4-3x) = (5y+4)² - (3x)²......(from the difference of 2 squares )

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2 years ago

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earnstyle [38]

Answer:

$\angle 1 = 45$ degrees

Step-by-step explanation:

Sum of 3 angles in a triangle is 180..

The angles given are:

7x + 12

So we sum to 180 and write:

$60+7x+12+\angle 1=180\\72+7x+\angle 1=180\\7x+\angle 1=108$

Also, straight angle is 180 degrees, thus Angle 1 and (14x + 9) angle is sum to 180, thus we can write:

$14x+9+\angle 1=180\\14x + \angle 1=171$

Or we can write this as:

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We substitute this expression for Angle 1 into 1st equation we got and solve for x first,

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2 years ago

Convert to standard form of the equation into the slope intercept form -3x-5y=-15

Mamont248 [21]

Our goal is to get y by itself
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2 years ago

Read 2 more answers

Determine the missing number in the equation 13-2=12-?

soldier1979 [14.2K]

For the equation to work, you have to have the same number on both sides of the equal sign

so to find ?, you can do:

13 - 2 = 12 - ? Simplify

11 = 12 - ? Subtract 12 on both sides

-1 = - ? Multiply -1 on both sides

1 = ?

5 0

2 years ago