I think #1 is -1/2 but im not sure i dont know about the other answers
Answer:
Given:
x-y=-4
2x+y=4
Step-by-step explanation:
x-y=-4
2x+y=4
add both the equation, we get
⇒ x-y=-4
2x+y=4
⇒3x=-4+4
⇒3x=0
⇒x=0
∴ to find the value of y, put the value of x in any one equation
⇒x-y=-4
⇒0-y=-4
⇒-y=-4
⇒y=4
∴ x=0, y=4
Here is the correct answer, and explanation for how to get the answer, and a way to remember how to use them for next time :)
Answer:
Add 3 each time. (for question #8)
Step-by-step explanation:
9+3=12
12+3=15
15+3=18
18+3=21
21+3=24
24+3=27
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