Asked by Reyrey
Which pattern could have been used to create the sequence?
20, –40, 80, –160, 320
Multiply the previous term by –2
Divide the previous term by 2
Subtract 60 from the previous term.
Add –60 to the previous term.
20, –40, 80, –160, 320
Multiply the previous term by –2
Divide the previous term by 2
Subtract 60 from the previous term.
Add –60 to the previous term.
Answers
Answered by
Chloe
If this is a multiple choice question, can't you just test each?
e.g. for (A): -160 x -2 = 320
Therefore, the answer is "multiply the previous term by -2"
To check that the rest are incorrect:
for (B): -160 /2 ≠ 320
for (C): -160 - 60 ≠ 320
for (D): -160 + -60 ≠ 320
NOTE: ≠ means 'not equal to'
e.g. for (A): -160 x -2 = 320
Therefore, the answer is "multiply the previous term by -2"
To check that the rest are incorrect:
for (B): -160 /2 ≠ 320
for (C): -160 - 60 ≠ 320
for (D): -160 + -60 ≠ 320
NOTE: ≠ means 'not equal to'
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