In this case using the elimination method is actually easier, but the question asks you to use substitution method so....
2x+y= -10
3x-y=0
1st equation: It is better to isolate 2x on both sides because the y is going to be positive no matter what, 2x+y=-10 => y=-2x-10
If you isolated 3x for the 2nd equation, the y will be negative, and you have to divide the whole equation by -1 to make it positive
Now we got y=-2x-10, lets substitute it in the 2nd equation and solve for x:
3x-(-2x-10) = 0
5x+10=0
5x=-10
x=-2
Now lets solve for y:
3(-2)-y=0
-6-y=0
y=-6
Lets see if the same is applicable for 1st equation
2(-2)+(-6)=-10
-10=-10
Yess!!
(-2,-6) is the solution
The answer to the question is explained at the beginning
Hope it helps!
Answer: 40%
Step-by-step explanation: Convert fraction (ratio) 16 / 40 Answer: 40%
Answer:
Step-by-step explanation:
X F(X)
0 ⇒ -2(0) + 3 = 3
1 ⇒ -2(1) + 3 = 1
2 ⇒ -2(2) + 3 = -1
3 ⇒ -2(3) + 3 = -3
Answer:
113 cm³
Step-by-step explanation:
The volume of the cat's food that the container would contain = volume of cylinder = πr²h
Where,
π = 3.14
r = ½(6) = 3 cm
h = 4 cm
Volume = 3.14 × 3² × 4
Volume = 3.14 × 9 × 4 = 113.097336
≈ 113 cm³