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60?

Step-by-step explanation:

x = 60

Step-by-step explanation:

180 - (60 + 60) = x

180 - 120 = x

60 = x

since it is an equilateral triangle (meaning all angles are the same), you can also take 180 and divide it by 3:

180 ÷ 3 = 60

x = 60

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

step-by-step explanation: 4 cause 2+2=4