Answer:
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Step-by-step explanation:
Answer:
An irrational number cannot be expressed as a ratio between two numbers and it cannot be written as a simple fraction because there is not a finite number of numbers when written as a decimal. Instead, the numbers in the decimal would go on forever, without repeating.
Step-by-step explanation:
basically
An=a1(r)^(n-1)
a7=a1(r)^(7-1)=a1r^6
a10=a1(r)^(10-1)=a1r^9
a10/a7=(a1r^9)/(a1r^6)=r^3
a10/a7=3/81=r^3
3/81=1/27
1/27=r^3
cube root both sides
1/3=r
subsitute
a7=a1r^6
81=a1(1/3)^6
81=a1(1/729)
times 729 both sides
59049=a1
first term is 59049
common ratio is 1/3
Answer:
0.2*10^5
Step-by-step
The first digit (0 in this case) is part of the whole number, while all other numbers are behind the decimal explanation:
Answer: -3/2
Step-by-step explanation:
The axis of symmetry, and thus the x-coordinate of the vertex, is given by 
So, the answer is 
