Answer:
A
Step-by-step explanation:
We know that identity:
cos^2x+sin^2x=1.
From that we have:
cos^2x=1-sin^2x.
So it is:
cos^2x-sin^x=(1-sin^2x)-sin^2x=1-2sin^2x.
And this is A).
B) is not treu because cos^2 is not sin^2x+1
C) is not true because cos^2x-sin^x=1 is false.
D) is not treu because cos^2x is not sin^2x-1
Answer:
1. Option c
2. Option d
Step-by-step explanation:
This type of survey is includes a sample made up of voluntary responses. People only choose to or do not choose to respond.
This type of sampling method is most of the time unbelievable because generally only people with strong opinions about this particular questions will respond and it is usually towards the same direction as the question and this might not reflect the opinion of the whole population making the survey biased.
Answer:
The answer to your question is 7 and -1/7
Step-by-step explanation:
Data
First line Second line
B (4, 4) A (0, 1)
M (3.5, 0.5) C (7, 0)
Formula
Slope = m = (y2 - y1) / (x2 - x1)
Process
1.- Calculate the slope of the first-line
x1 = 4 y1 = 4
x2 = 3.5 y2 = 0.5
-Substitution
m = (0.5 - 4) / (3.5 - 4)
-Simplification
m = -3.5 / -0.5
-Result
m = 7
2.- Calculate the slope of the second line
x1 = 0 y1 = 1
x2 = 7 y2 = 0
-Substitution
m = (0 - 1) / (7 - 0)
-Simplification
m = -1/7
-Result
m = -1/7
Answer:
mmmm cnt get to it srry
Step-by-step explanation:
