Adam had 91 dollar. If he spent 21 dollars on new books, what is the ratio of money he still has to money he's spent?
2 answers:
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(a)
Answer:
=
=
*canceling 2.5 in numerator and denominator*
Properties used:
Cancellation property of fractions
Least Common Multiplier(LCM)
The least or smallest common multiple of any two or more given natural numbers are termed as LCM. For example, LCM of 10, 15, and 20 is 60.
(b)
Answer:
*using *
*Again, using *
Property used: 'Power of a power'
We can raise a power to a power
(x^2)4=(x⋅x)⋅(x⋅x)⋅(x⋅x)⋅(x⋅x)=x^8
This is called the power of a power property and says that to find a power of a power you just have to multiply the exponents.