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Step-by-step explanation:
the first question yields a rational number
second question 1/2x2/15 yields an irrational number
Answer:
x = -2, 2
Step-by-step explanation:
this one is easy since we can just use squres to factor
(5x -10) (5x + 10)
we want one positive one and one negative one since there is no middle term.
so basically we finde the solution by setting each part of the binomial = to zero
like this
5x - 10 = 0
+ 10 +10
5x = 10
divide by 5 on both sides of the equal sign
x = 2
and
5x + 10 = 0
-10 -10
5x = -10
divide by 5 on both sides of the equal sign
x = -2
therefore the solutions (AKA the zeroes) are x= -2, 2
Answer:
$241.58
Step-by-step explanation:
he amount of money A, accrued at the end of n years when a certain amount, P is invested at a compound annual rate, r, is given by:
![A=P(1+r)^n](https://tex.z-dn.net/?f=A%3DP%281%2Br%29%5En)
From the given information:
P =$150
r=10%=0.1
n= 5 years
Therefore the balance after 5 years is:
![A=P(1+r)^n\\=150(1+0.1)^5\\=150*1.1^5\\=\$241.58](https://tex.z-dn.net/?f=A%3DP%281%2Br%29%5En%5C%5C%3D150%281%2B0.1%29%5E5%5C%5C%3D150%2A1.1%5E5%5C%5C%3D%5C%24241.58)