Answer:
x=45
Step-by-step explanation:
An entire triangle is 180 degrees and you already know that one angle is 90 degrees. 180 - 90 is 90. Now you have the equation 2x=90.
You then divide each side by 2 to get the x by itself which leaves you with x=45.
Answer:
15
Step-by-step explanation:
the common ratio is 1/2 so you do 30(1/2)
30(1/2)=15
Answer:
Infinite
Step-by-step explanation:
Plug the negative into the equation.
y=x-12+2x
Add like terms
y=3x-12
Two of the same lines will always have Infinite solutions.
Answer:
1) null: π = 0.5, alternative: π > 0.5
2)p^= 80/124 =0.645
std error =(phat(1-phat)/n)1/2 =0.0430
3)z = (phat-p)/std erro =(0.645-0.5)/0.0430 =3.22
4)The observed proportion of couples who leaned to the right when kissing is 3.22 standard deviations above the null hypothesized value of 0.50
5)We have strong evidence that the proportion of couples that lean their heads to the right while kissing is more than 50%
2b=C-3a
b=C-3a/2 , is the answer
