Answer:
x=-3 and y=-3
Step-by-step explanation:
add the two equations, so 6x-6x, -6y-3y, and 0+27 to get -9y=27. y ends up equaling -3. plug negative 3 into the either of the equations and solve for x, which ends up being -3
2 x - 5 y = 18 / * 4
3 x + 4 y = 4 / * 5 ( we will use the addition method )
--------------------------
8 x - 20 y = 72
+
15 x + 20 y = 20
-----------------------
23 x = 92
x = 92 : 23
x = 4
8 - 5 y = 18
- 5 y = 18 - 8
- 5 y = 10
y = 10 : ( - 5 )
y = - 2
Answer:
( x, y ) = ( 4, - 2 )
Answer: x= 0.463
Step-by-step explanation:
Given the equation √5 cos(x) − 2 = 0
To make 'x' the subject of the formula
√5cosx = 2
Cosx = 2/√5
Cosx = 0.89
x = arccos 0.89
x = 0.463
Answer: The answer is 408/5 , as a mixed number = ( 81 3/5)
~hope this helps!~
Step-by-step explanation:
