PLEASE HELP 20 POINTS?

Terms of the sequence: -1, 6, -22, 90

Step-by-step explanation:

Plug these into the formula, starting with n=2 and a1 = -1.

a2 = -4a1 + 2

    = -4(-1) + 2 = 4 + 2 = 6

a3 = -4a2 + 2

    = -4(6) + 2 = -24 + 2 = -22

a4 = -4a3 + 2

    = -4(-22) + 2 = 88 + 2 = 90

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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i need a diagram

step-by-step explanation:

no