Split it into 2 equations
2x-9 = 7
2x = 16
x = 8
And another equation
2x-9 = -7
2x = 2
x = 1
The answer is x =1, x= 8
Answer:
yards of carpet you need: 4*10/3=40/3=13.3333 yd^2
Step-by-step explanation:
convert feet to yard:
1 yard=3 feet so
12 feet=4 yards
10 feet=10/3 yard=3.33333 yard
yards of carpet you need: 4*10/3=40/3=13.3333 yd^2
Step-by-step explanation:
That's the rifgt answer for sure!!
Plz Mark brainliest...
Answer:
1 ) sin 165°
2 ) cos 330°
3 ) Tan 157.5°
4 ) 
Step-by-step explanation:
1 )
Given expression is 
We know that 


So the first expression is sin (330/2)° =sin 165°
2 )
GIven expression is 
We know that 
So the result is cos 330°
3 )
Given expression is 
We know that 
Also we know that sin2x = 2sinxcosx
So The numerator becomes
. and the denominator becomes as 

So the result is Tan 157.5°
4 )
Given expression is 
We know that 

So the result is 
In a normal distribution, the z value for an x value that is to the right of the mean will always be positive while on the other hand if the z value for an x value that is to the left of the mean it will always be negative. It is because left side is always negative and right side is always positive.