Simplify the following 1.1) 4m-n+8n-9m
1.2) ab+(a²-2b)
1.3) 4d-d (2d+2)
1.4)4(b-2)+6(b+1)
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Q.1.1

Q 1.2

this can't be simplified.

Q. 1.3

Q.1.4

a. she will receive a refund of $278.

step-by-step explanation:

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.