Answer:
$79
Step-by-step explanation:
That's the Khan Academy answer
Answer:
a. {(0, 7), (-1, 6)}
Step-by-step explanation:
subtract the equations
for , substitute x = 0
for , substitute x = 0
3x + y = 18
2x - y = 12
we must make both equations have only one variable
we first add the equations top to bottom, and get
5x = 30
we then divide by 5, and get x = 6
now we sub 6 in for x, and solve for y
3x + y = 18 y = 18 - 3x
y = 18 -18
y = 0
the first number is 6, the second number is 0
Answer:
the result is true
remember if division must be operated first and 0.5=5/10=1/2
1-1/2:0,5=1-1/2:1/2
=1-(1/2:1/2)
=1-1=0