Answer:
a, c, a, a, b, c
Step-by-step explanation:
Multiplying fractions: multiply numerators and multiply denominators
1. 3/4 X -6/7 = -18/28 = -9/14
2. -2/7 X -3/7 = 6/49
3. 4 because 72/9 is 8. -72/-9 is 8. Two negatives makes a positive when multiplying and dividing.
X + 1
Combine like terms, so terms with x go together and terms without an x go together
So 2x - x = x
3 - 2 = 1
That's as simplified as it can be
0.20a=220
Where 0.20 is the decimal form of 20%
a is the unknown number
0.20a=220
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0.20 0.20
a=1100
220 is 20% of 1100.