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2.mary is twice older than her sister .in 5 years time ,she will be 2 years older than her sister .find how old are they both now.
answer both (1 and 2)
2.mary is twice older than her sister .in 5 years time ,she will be 2 years older than her sister .find how old are they both now.
answer both (1 and 2)
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1) Alternate exterior angles are equal.
2x + 15° = 3x - 10°
x = 15° + 10° = 25°
2) Mary age - m ; Her sister age - n
m = 2n ; (m + 5) = (n + 5) + 2
(2n + 5) = (n + 5) + 2
n = 5 - 5 + 2 = 2
m = 2n = 2(2) = 4
Mary age - 4 years.
Her sister age - 2 years.
Answer 1]
In the figure it is an alternate angle.
2x + 15° = 3x - 10°
x = 15°+ 10° = 25°.
Answer 2] In the attachment