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ad-work [718]
4 years ago
9

Celia is comparing two different antivirus programs. StaySafe costs $22 for the first year and $5 for each year she renews. Viru

sProtector costs $10 for the first year and $8 for every year she renews. Which equation would you solve to find the number of years, y, that Celia would have to renew to make the costs of the antivirus programs equal?
Mathematics
1 answer:
bearhunter [10]4 years ago
5 0
The equation would be v=5y+22
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N*3.25=325.00
N=325.00/3.25
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Someone please help me understand how to do this
andrey2020 [161]

Answer: These are the answers for the first section

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8 0
3 years ago
Solve sin theta + 1 = cos 2 theta on the interval 0 less than or equal to theta &lt;2 pi
hjlf

Answer:

Ф = 0 and Ф = π

Step-by-step explanation:

* Lets explain how to solve the problem

∵ sin Ф + 1 = cos²Ф, where 0 ≤ Ф < 2π

- To solve we must to replace cos²Ф by 1 - sin²Ф

∵ sin²Ф + cos²Ф = 1

- By subtracting sin²Ф from both sides

∴ cos²Ф = 1 - sin²Ф

- Lets replace cos²Ф in the equation above

∴ sin Ф + 1 = 1 - sin²Ф

- Subtract 1 from both sides

∴ sin Ф = - sin²Ф

- Add sin²Ф for both sides

∴ sin²Ф + sin Ф = 0

- Take sin Ф as a common factor from both sides

∴ sin Ф(sin Ф + 1) = 0

- Equate each factor by 0

∵ sin Ф = 0

∴ Ф = 0 OR Ф = 2π

∵ sin Ф + 1 = 0

- Subtract 1 from both sides

∴ sin Ф = -1

∴ Ф = π

∵ 0 ≤ Ф < 2π

∵ Ф < 2π

∴ We will refused the answer Ф = 2π

∴ Ф = 0 and Ф = π

7 0
3 years ago
In which step did the student first make a mistake and how can it be corrected? (4 points)
In-s [12.5K]

Answer: The answer is Step 2 it should be m o plus m p = 180 degrees (Supplementary angles)

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