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SMILEEEEIN
Answered

PLEASE HELP ME I REALLY REALLY NEED IT TONIGHTT PLEASEEE:((​

PLEASE HELP ME I REALLY REALLY NEED IT TONIGHTT PLEASEEE class=

Sagot :

BLUEMOLDIN

Answer:

Formula: an=a1+(n-1)d

1. a18= 8+(18-1)(7)

= 8+(17)(7)

= 8+119

a18= 127

2. a17= -5+(17-1)(4)

= -5+(16)(4)

= -5+64

a17= 59

3. a9= 1+(9-1)(7)

= 1+(8)(7)

= 1+56

a9= 57

4. a20= 7+(20-1)(8)

= 7+(19)(8)

= 7+152

a20= 159

5. a21= -4(21-1)(3)

= -4(20)(3)

= -4(60)

a21= -240

Hope it helps

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