Answer: C
Step-by-step explanation:
x-3y=5, y=x-7 *solve it
the answer is (8,1)
so..
C. (8,1) is a solution to both equations so it is a solution to the system
Hello,
sin(-45°)=-√2 /2 =-0,7071067....
Answer:
sometimes
Step-by-step explanation:
|x| =x
We can look at 3 case, when x>0, x=0, and when x<0
If x>0
|3| =3
3 = 3
True
x=0
|0| =0
0 = 0
True
x<0
|-3| =-3
3 = -3
False
Answer:
x=12
Step-by-step explanation:
5(x-3)=45
x=12
We are asked to solve for the value of cos C on which given side measurements are enumerated below:
AB = 9
BC = 40
CA = 41
Solving for the value of cos C, we will apply Law of Cosines such as the solution is shown below:
cos C = BC² + CA² - AB / (2*BC*CA)
cos C = 40² + 41² - 9² / (2*40*41)
cos C = 0.97561
The answer for the value of cos C is "0.97561".