Answer:
3rd and 4th option
Step-by-step explanation:
-1 times -1 is 1 and multiply that by another -1 and you get -1
-1 times -1 is 1 and you do that twice in the last option so that would be 1 and then multiply that by-1 and you get -1.
Answer:
1
Step-by-step explanation:
points:
(-10, -20) and (1, -9)
y-y1=m(x-x1)
m= (y-y1)/(x-x1)
m=(-20-(-9))/(-10-1)= (-11)/(-11)= 1
m=1
False, trigonometry is not the study of three dimensional shapes.
Answer:
Step-by-step explanation:
The formula for determining the confidence interval for the difference of two population means is expressed as
z = (x1 - x2) ± √(s²/n1 + s2²/n2)
Where
x1 = sample mean of group 1
x2 = sample mean of group 2
s1 = sample standard deviation for data 1
s2 = sample standard deviation for data 2
For a 95% confidence interval, the z score is 1.96
From the information given,
x1 = 25 pounds
s1 = 9 pounds
n1 = 78
x2 = 14 pounds
s2 = 7 pounds
n2 = 43
x1 - x2 = 25 - 14 = 11
√(s²/n1 + s2²/n2) = √(9²/78 + 7²/43) = √1.038 + 1.1395)
= 1.48
The upper boundary for the confidence interval is
11 + 1.48 = 12.48 pounds
The lower boundary for the confidence interval is
11 - 1.48 = 9.52 pounds
Answer:
first draw three triangle of different sizes and shape after that make box and measure each angle of each triangle with protractor and add three angles of triangle after you will find answer 180