Answer:
The second and fourth option
Step-by-step explanation:
In order for two lines to be perpendicular they must intercept each other and their slope must be the opposite inverse; ex: 
the negative inverse is 4 (multiplying by -1 and flipping the fraction)
Multiplication would be the inverse operation of division. so it would be, 3 x 34 = 102
above, -6 and -<span>1 2x2</span> - 6x - 1x - 3. Step-4 :
Answer:
3
Step-by-step explanation:
Let x = # of boxes of felt-tip pens.
(x)(3.44)+(4x)(4.41) = 63.24
21.08x = 63.24
x = 3
Because x = 3, the man bought 3 boxes of felt-tip pens and 12 boxes of ballpoint pens.
Answer:
Step-by-step explanation:
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