Hi Emily,
For question #5 of review #3, to find the “unit” price, you are trying to find out how much it would cost for 1 pen. So you take $15.48 and divide it by 12 which will give you about $1.12 per pen. Whenever they has you for the unit rate for anything, it means how much for 1 of that particular item (Eg. 80km per hour).
Mr. Bawa

Hi Emily,
For Question #7 of review #3, two lines are parallel if they have the exact same slope. For example, a line in the form y = mx + b, m = slope (rise/run) and b = y -intercept. When we are looking to compare to see if it is parallel or perpendicular then we just look at the slope (m) . If the slope is the same it is parallel (Eg./ Given the lines y = 2x + 6 & y = 2x – 8, m = 2 for both the lines, so these lines are both parallel). If the 2 lines are perpendicular, then the slopes are negative recipricols of each other (Eg./ Given the lines y = (2/3)x + 6 & y = (-3/2)x -5, m = 2/3 & m = -3/2 for these lines so they are perpendicular). For #7, y = 4x + 1 and y = (-1/4)x + 7, m = 4/1 and m = -1/4, so these lines are perpendicular. Hopefully this makes sense. If not, then I will be at school today (Jan 23) or on Mon Jan 26 and you can come see me for help. Have the office page me if you can’t find me.
Mr. Bawa

Hi Emily,
I will be in room 149 supervising someone else’s exam. The exams run for about 2 hours so I will be there till about 11 and then after I will be in room 231 which is the staff work room.
Mr. Bawa

hey mr. B its Emily I was wondering for question 5 of the 3rd review, when it asks for the unit price its meaning how much it costs for just 1 pen?

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Hi Emily,

For question #5 of review #3, to find the “unit” price, you are trying to find out how much it would cost for 1 pen. So you take $15.48 and divide it by 12 which will give you about $1.12 per pen. Whenever they has you for the unit rate for anything, it means how much for 1 of that particular item (Eg. 80km per hour).

Mr. Bawa

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Okay thanks that’s what I thought

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could you explain #7

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Hi Emily,

For Question #7 of review #3, two lines are parallel if they have the exact same slope. For example, a line in the form y = mx + b, m = slope (rise/run) and b = y -intercept. When we are looking to compare to see if it is parallel or perpendicular then we just look at the slope (m) . If the slope is the same it is parallel (Eg./ Given the lines y = 2x + 6 & y = 2x – 8, m = 2 for both the lines, so these lines are both parallel). If the 2 lines are perpendicular, then the slopes are negative recipricols of each other (Eg./ Given the lines y = (2/3)x + 6 & y = (-3/2)x -5, m = 2/3 & m = -3/2 for these lines so they are perpendicular). For #7, y = 4x + 1 and y = (-1/4)x + 7, m = 4/1 and m = -1/4, so these lines are perpendicular. Hopefully this makes sense. If not, then I will be at school today (Jan 23) or on Mon Jan 26 and you can come see me for help. Have the office page me if you can’t find me.

Mr. Bawa

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Okay I’ll come see you after my exam on Monday, what room are you going to be in?

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Hi Emily,

I will be in room 149 supervising someone else’s exam. The exams run for about 2 hours so I will be there till about 11 and then after I will be in room 231 which is the staff work room.

Mr. Bawa

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