Answer: 320 black pens
Step-by-step explanation:
480 ÷ 3 = 160
160 red pens
Then you have
160 + 160 = 320 black pens
If you have any questions let me know! :)
Hope this helps!!! Good luck!!! ;)
Answer:
Lines 2 and 4 are perpendicular
Step-by-step explanation:
Line 2: 4y=3x-4
y=3/4x - 1
Line 4: 4x+3y=-6
3y=-6-4x
y=-2 - 4/3x
The two lines are perpendicular since -4/3= - (inverse of 3/4)
Answer:
x = 1 and y = 2
the second one x = 2 and y = 1
Step-by-step explanation:
Answer:
-1
Step-by-step explanation:
substitute (8-3) / -5
5 / -5
-1