Which of the sets of ordered pairs represents a function?

A = { (-4, 5), (1, - 1), (2, - 2), (2, 3) }

B = { (2, 2), (3, - 2), (9, 3), (9, - 3) }

Only A

Only B

Both A and B

Neither A nor B

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The ages of three brothers add up to 38 years. The oldest brother is 5 years older than the youngest brother. Five years ago, the oldest was twice the age of the youngest.

2 ((5+3) (2+4)) 2 (5+3 (2+4)) solve

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Tyna simplified the expression StartFraction 3 x cubed Over 12 x Superscript negative 2 Baseline EndFraction to StartFraction x Over 4 EndFraction. What was Tyna's mistake?

List the amplitude, period, phase shift and vertical shift of the function (t) = 5 sin 2t.

Simplify s7 4 1216-10-7-5 6

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Car A travels 105 miles on 3 gallons of petrol. Car B travels 80 miles on 9 litres of petrol. which car has the better petrol consumption (ie more miles per gallon) ? you may use the fact that 1 gallon=4.5 litres.