a) (-9,3)
Step-by-step explanation:
x + 2y = -3
- (x - y = -12)
- x + y = 12
3y = 9
y = 3
x - y = -12
x- 3 = -12
x= - 9
(-9, 3)
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step-by-step explanation:
6 hours 48 min
68÷5=13.6
13.6×30=408min=6 hours 48 min.
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