Answer:
x=9
Step-by-step explanation:
Answer:
(4x + 7y)(4x - 7y)
Step-by-step explanation:
Rewrite 16 as 4^2
= 4^2x^2 - 49y^2
Rewrite 49 as 7^2
= 4^2x^2 - 7^2y^2
Apply the Exponent Rule Pt 1 ((a^m*b^m =(ab)^m))
= (4x)^2 - 7^2y^2
Apply the Exponent Rule Pt 2
= (4x)^2 - (7y)^2
Apply Difference of Squares Formula (( x^2-y^2 = (x + y)(x - y)
= (4x + 7y) (4x - 7y)
Solution :
This is the two tailed test.
The null hypothesis and the alternate hypothesis is as :
Null hypothesis is 
Alternate hypothesis is 

Therefore, the critical value of z is :

Now the test statics is :



The test statics is 0.878
We see that it is a right tailed test.


= 0.3800
Thus , P-value > α
So we fail to reject the null hypothesis.
Answer:
x=16
Step-by-step explanation:
Pythagorean theorem:
20^2-12^2=256
square root of 256=16