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3 years ago

6

You spend half of your allowance at the movies, and you mow lawns over the weekend to earn an extra $12. If you have $25 right n

ow, how much allowance did you receive.

1 answer:

ziro4ka [17]3 years ago

8 0

Answer:

$26

Step-by-step explanation:

hope this helps!

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What are the explicit equation and domain for a geometric sequence with a first term of 4 and a second term of −12?

Lerok [7]

$a_1=4;\ a_2=-12\\\\r=\dfrac{a_2}{a_1}\to r=\dfrac{-12}{4}=-3$

The formula of a geometric sequence:

$a_n=a_1\cdot r^{n-1}$

substitute

$a_n=4\cdot(-3)^{n-1}$

$The\ domain:\ \text{all integers where}\ n\geq1$

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3 years ago

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An expression on the total cost to download the movies

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3 years ago

When solving for x, what is x squared plus 15 equals -8x

VLD [36.1K]

Answer:

x = - 5, x = - 3

Step-by-step explanation:

Given

x² + 15 = - 8x ( add 8x to both sides )

x² + 8x + 15 = 0 ← in standard form

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The factors are 5 and 3, since

5 × 3 = 15 and 5 + 3= 8, thus

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Equate each factor to zero and solve for x

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3 years ago