exam
Maths Puzzle
Numerical Ability
Carbon 14 Dating: A sample from a refuse deposit near the Strait of Magellan had 60% of the carbon 14 of a contemporary living sample. How old was the sample?
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exam Other Question
Find an equation for line with y-intercept 3 that is perpendicular to the line y=(2/3)x-4.
posible answer
a.2y=6-3x
b.2y=3x+6
c.3y+9- 2x
d.3y=2x+9
2.fahrenheit an celcius
the question is:
solve this system.
x-y=5
x2+y2=25