What is the common ratio of the geometric sequence below? -5,-10,-20,-40​

2

Step-by-step explanation:

The common ratio of a geometric sequence can be found simply by dividing any term by the term in front of it.  Simply do -20/-10 to get the common ratio, 2.

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a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.