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Greeley [361]
3 years ago
11

9x + 8y = -1 -7x – 8y = 15

Mathematics
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

{y = 15/8 - (9 x)/8, y = -(7 x)/8 - 2}

{9 x + 8 y = 15, 7 x + 8 (y + 2) = 0}

Step-by-step explanation:

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When working with inequalities what do you do when its x squared > 16 and vice versa does the sign flip.
S_A_V [24]

Answer:

x4

\{x\in \mathbb{R}|  \:\left(-\infty \:,\:-4\right)\cup \left(4,\:\infty \:\right)    \}

Step-by-step explanation:

x^2>16

x\sqrt{16}

x4

The interval notation will be:

\{x\in \mathbb{R}|  \:\left(-\infty \:,\:-4\right)\cup \left(4,\:\infty \:\right)    \}

The contrary,

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6 0
4 years ago
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How do you solve 3(15.9 - 3.9)<br> Step by step? I need help
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Answer:

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Step-by-step explanation:

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3 · (15.9 - 3.9)

3(15.9) - 3(3.9)

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47.7 - 11.7

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5 0
3 years ago
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The amount of money in Nadia’s savings account is represented by the recursive formula an=1.025(an-1)+50 if a6=291.51 what are t
Elis [28]
Recursive formula is one way of solving an arithmetic sequence. It contains the initial term of a sequence and the implementing rule that serve as a pattern in finding the next terms. In the problem given, the 6th term is provided, therefore we can solve for the initial term in reverse. To make use of it, instead of multiplying 1.025, we should divide it after deducting 50 (which supposedly is added).
<span>
Therefore, we perform the given formula: A (n) = <span>1.025(an-1) + 50
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a(4) = 1.025 (181.09) + 50 = 235.62

a(3) = 1.025 (127.89) + 50 = 181.09

a(2) = 1.025 (75.99) + 50 = 127.89

a(1) = 1.025 (25.36) + 50 = 75.99

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The terms before a(6) are indicated above, since a(6) is already given.

So, the correct answer is <span>A. $25.36, $75.99.</span>
3 0
3 years ago
What is the answer to 3x-7+6=7x+6
strojnjashka [21]
3x - 7 + 6 = 7x + 6
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3x = 7x + 6 + 7 - 6
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3x = 7x + 7
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3 years ago
Find what is x + 2½ = 10?
Ilia_Sergeevich [38]

Answer:

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6 0
3 years ago
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