Question 7 of 8
Select ALL the correct answers.
Consider the arithmetic sequence below.
-5, 4, 13, 22, 31, ...
Select all functions that define the given sequence.
D
R1) = -5, fin) = -fin-1) + 9, for n 2 2
fin) = 9n - 5
f(1) = -5, fin) = fin - 1) + 9, for n 22
fin) = 9n - 14
0
An) = -50+ 9
f(1) = -5, fin) = fin - 1) + 7, for n 2 2
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1 and 2

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15