I can do 15, 17 and 18.
15. (x+5)+4x=180 (A line is 180 degrees.)
you can subtract 5 from 180 to get 175.
4x+x =175
5x=175
divide 5 to get x=35
plug 35 into x to get 40 and 140.
17. Same thing with the line = 180 degrees
6x-4+4x-6=180
10x-10=180
combine like terms.
10x=190
add 10 to both sides
x=19
divide 10.
plug 19 in 6*19-4=110, so y=110 (since parallel lines)
and 4*19-6=70
19. y=90 (the square means 90 degrees)
x-7+3x-3=90 (since 90+90=180)
4x-10=90 (combine like terms)
4x=100 (add 10)
x=25
plug it in again to get 25-7=18 and 3*25-3=72
Answer:
2.42
Step-by-step explanation:
We are asked to consider a sample of blades for a circular saw, and their diameters were measured.
We are told they have a sample of variance, S²= 2.42
We are told to give a point estimate for the population variance in diameters of blades for the circular saw.
The sample variance, S² can be said to be a point estimate of the population variance.
Therefore, it can be said that the sample variance, S² is a point estimate for the population variance, b².
Which can also be written as:
b² = S²
b² = S² = 2.42
• The point estimate for the population variance is 2.42
S(-2)=30
r(8)=99
0.303030303030303030303030303030
(a4-6a+5)-(a4-3a+4a-6)
by expressing like term
a4-a4=0
-6a-(-3a+4a)=-5a
5-(-6)=11
:we have-5a+11
B multiply 218 by 40 and you get 8,720