Answer:
Step-by-step explanation:
-6x + y = 4
<u>6x - 2y = -2 </u>+
-y = 2
y = -2
.
Substitute the value of y to the one of equations
6x - 2y = -2
6x -2(-2) = -2
6x + 4 = -2
6x = -2 - 4
6x = -6
x = -1
Step-by-step explanation:
I know only 1 Answer
1. p=
3-(-1)(7)/5
3+1(7)/5
3+7/5=10/5=2
p=2 Answer
hope it helps....
Answer
16.65
Step-by-step explanation:
The the missing number 140 because you add the 40 + the 140 and you get 180
Let the angle between a and b be x then,
x = arccos((a^2 + b^2 - b^2)/2ab = arccos(a/2b)
x = arccos(2/2(3.236)) = arccos(1/3.236) = arccos(0.3090) = 80°
Thus, the angle opposite c = 180 - 80 = 100°
Therefore, c = sqrt(a^2 + b^2 - 2abcos C) = sqrt(2^2 + 3.236^2 - 2(2)(3.236)cos 100) = sqrt(14.471696 + 2.247702) = sqrt(16.719398) = 4.089
c = 4.089