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4 seasons in a year.
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What is 4 S in a Y?
Four Seasons in a Year
How do you factor y2 plus 8y plus 16?
y2 + 8y + 16 = y2 + 4y + 4y + 16 = y(y + 4) + 4(y + 4) = (y + 4)(y + 4) or (y + 4)2
If y ( x ) 4 x what is x when y ( x ) 4?
y=-x+4
What two numbers multiply to be 3 and add to -4?
-1
Sarah is sixteen years old and four times as old as her brother How old will Sarah be when she is twice as old as her brother?
She will be 24.S=16 (Sarah is 16 years old)S=4B (Sarah is 4 times as old as her brother)S/4=B16/4=BB=4 (Sarah's brother is 4 years old)How old will Sarah be when she is twice as old as her brother?S+Y=2(B+Y); S= Sarah's age, B= Sarah's Brother's age, Y=years passed16+Y=2(4+Y)16+Y=8+2Y16=8+2Y-Y16=8+Y16-8=Y8=Y (Sarah will be twice as old as her brother after 8 years pass)How old is Sarah after 8 years pass?S+Y=Final Answer16+8=24Checking work:B+Y=4+8=12Is 12 half of 24? Yes.Therefore Sarah will be twice her brothers age when she is 24 and her brother will be 12.-------------------The keys here areSarah's age S = 16Sarah's brother's age B = 16/4 = 4Years that pass = TThe equation isSarah's future age is twice her brother's future age16+T = 2 (4+T)16+T = 8 +2T16 = 8+2T - T16 = 8 + T8 = TSarah's future age = 16 + T = 24
