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fiasKO [112]
3 years ago
10

Which of the following are solutions to the equation below?

Mathematics
1 answer:
anastassius [24]3 years ago
4 0

Answer:

C and F

Step-by-step explanation:

Given

(3x - 5)² = 19 ( take the square root of both sides )

3x - 5 = ± \sqrt{19} ← note plus or minus

Add 5 to both sides

3x = ± \sqrt{19} + 5 ( divide both sides by 3 )

x = ±\frac{\sqrt{\sqrt{19}+5 } }{3}

Separating the solutions

x = \frac{\sqrt{19}+5 }{3} → C

x = \frac{-\sqrt{19}+5 }{3} → F

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3 years ago
Find the 13th term of the arithmetic sequence whose common difference is d=7 and whose first term is a1=-3
timama [110]

Answer:

81

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the formula for an arithmetic sequence:

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