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IRINA_888 [86]
3 years ago
6

Need quick help with 2 math equations asap! Thanks!

Mathematics
1 answer:
solong [7]3 years ago
5 0

Before answering, keep in mind that parallel lines have equal slopes and perpendicular lines have negative reciprocal slopes. Each problem has you find the slope and then use that rule.


For line F, m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}}


Let xx_{1} = 7, xx_{2} = 9, yy_{1} = 13, yy_{2} = -3


m = \frac{-3 - 13}{9-7}


m = \frac {-16}{2}


m = 8


For line E, the calculations are similar and the slope is 3/5. The perpendicular line would have m = -5/3.

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Amma hikes 2and3/4 miles of nature trail in 1 hour and 15 minutes. How many miles does Amman hike per hour?
LekaFEV [45]
Formula
====
d = r * t

Givens
======
d = 2 3/4
t = 1 hour 15 minutes 
r = ????

Calculations
==========
You need to convert the 15 minutes to hours.
1 hour = 60 minutes
x hour = 15 minutes

1/60 = x/15
x = 15/60
x = 0.25 hours
so the time = 1 hours + 0.25 hours
t = 1.25 hours

Now you need to do something with the distance.
3/4 mile = 0.75 of a mile
So the distance = 2 + 0.75 = 2.75 miles

Now you are ready for the answer.
d = r * t you are looking for r
2.75 = r * 1.25
r = 2.75/1.25
r = 2.2 miles / hour

Note you could do this with fractions.
2 3/4 = 11/4
1 1/4 =  5/4

r = 11/4 // 5/4 =11/5 = 2 1/5 which is the same thing as 2.2. If your calculator can handle fractions (those kind of calculators cost about 10 dollars in Canada. It should be 8 in the US) that might be the way to do this problem.
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Could u solve this pls?
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The answer is 20. Hope it helps.
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can be simplified as 5-9+7=-4+7=3

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