If x+1/x=7,find x^2+1/x^2
1 answer:
Answer:
x²+1/x² = 51
Explanation:
Given x - 1/x = 7 ---(1)
We know the algebraic identity:
a²+b²-2ab = (a-b)²
Or
a²+b² = (a-b)²+2ab
Now,
x²+1/x²
= (x-1/x)²+2*x*(1/x)
= (x-1/x)²+2
:7²+2 [ from (1)] =
= 49+2
= 51
Therefore,
x²+1/x² = 51
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Substitute the values into the inequality:
-1 - 1 > 0
-2 > 0
False
Answer:
2.5 Miles
Step-by-step explanation:
4 k = ? Mile
1.6 k = 1 mi
4/1.6 is 2.5
1x2.5 equals 2.5
so 4 km should be 2.5 mi
4 k = 2.5 Mile
(x2.5)1.6 k = (x2.5)1 mi
I guess it's because tangent is written as y/x and slope is x/y
Answer:
1.) Vertical angles. 2.) 76 degrees. 3.) 36 degrees.
G(x)=-1-2
g(x)=-3
i’m pretty sure that’s the answer
