Answer:
Huh these are the world's on solved problems
Step-by-step explanation:
In an ordered pair, x is the first number and y is the second number. So this is telling you x=1 and y=-5. You can take this information and plug it into the formulas.
x + 2y = -9
1 + 2(-5) = -9
1 + -10 = -9? True
x - y = 6
1 - -5 = 6? *
1 + 5 = 6? True.
(*Subtracting a negative makes it a positive.)
Answer:
Step-by-step explanation:
x+i*y≠0 ==> x≠0 and y≠0
x-i*y≠0 ==> x≠0 and y≠0
We must exclude (0,0) as solution.


Answer: 21
Step-by-step explanation: 12 in 4 minutes means every minute 3 marshmallows are roasted, 4x3=12, so add three more minutes and you get 21. 7x3=21
Answer:
x=3
Step-by-step explanation:
1.4x+1.1=8.3-x
1.4x+x=8.3-1.1
2.4x=7.2
x=7.2/2.4
x=3