Find the slope of the lines. are the graphs of the two lines parallel our perpendicular? explain how you can use the slope of the two lines to tell if they are parallel. then explain how you can use the slope of the two lines to telli'd they are perpendicular. y = 3/7x + 11 7x + 3y = 13

You know that two lines are parallel if they have the same slope and you can tell if two line are perpendicular if they have slopes that are opposite reciprocals, for example, 4's opposite reciprocal is -1/4. The two lines would be perpendicular because if you solve the second equation you get y=-7/3+13/3 and -7/3 is the opposite reciprocal of 3/7.

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!

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both have same length