JeroMii
14.01.2020 •
Mathematics
Angie is x years old. her sister is 12 years older than her while their mother is twice as old as her sister. betty is 3 years younger than angie while betty's mother is 4 times as old as betty. express angie's mother's age in terms of x. express betty's mother's age in terms of x. if angie's mother is 6 years older than betty's mother, find angie's age
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Ответ:
Step-by-step explanation:
Parking lot:
Angie=x
Sister=x+12
Amom=2•(sister) or 2(x+12)=2x+24
Betty=x-3
Bmom=4•(betty) or 4(x-3)=4x-12
Part A: Amom=2x+24
Part B: Bmom=4x-12
PartC:
x=angie
Amom=Bmom+6
2x+24=4x-12+6
2x+24=4x-6
24-6=4x-2x
18=2x
9=x
Angie is 9 years old.
Ответ:
Write all fractions in terms of a common denominator:
Then move all fractions to one side and simplify the numerator:
The numerator dictates when the fraction reduces to 0. The denominator can never be 0, so we know that y cannot take any of the values -2, -9, -3, nor -8.
So the equation reduces to
Expand the left side; you would end up with