Find the slopes of line j and line k. Are they parallel? IF U ANSWER RIGHT I WILL MARK BRAINLIEST PLEASE ANSWER NEED ANSWER FAST
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A) slope of line j = 1; slope of line k = 1; YES
B) slope of line j = 1; slope of line k = 3; NO
C) slope of line j = 3/2; slope of line k = 1; NO
D) slope of line j = 1; slope of line k = 3/2; NO
A) slope of line j = 1; slope of line k = 1; YES
B) slope of line j = 1; slope of line k = 3; NO
C) slope of line j = 3/2; slope of line k = 1; NO
D) slope of line j = 1; slope of line k = 3/2; NO
2 answers:
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Choice A is the answer which is the point (1,-1)
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How I got this answer:
Plug each point into the inequality. If you get a true statement after simplifying, then that point is in the solution set and therefore a solution. Otherwise, it's not a solution.
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checking choice A
plug in (x,y) = (1,-1)
This is true because -3 is equal to itself. So this is the answer.
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checking choice B
plug in (x,y) = (2,4)
This is false because 0 is not to the left of -3, nor is 0 equal to -3. We can cross this off the list.
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checking choice C
plug in (x,y) = (-2,3)
This is false because 7 is not to the left of -3, nor is 7 equal to -3. We can cross this off the list.
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checking choice D
plug in (x,y) = (3,4)
This is false because -2 is not to the left of -3, nor is -2 equal to -3. We can cross this off the list.
Answer:
Step-by-step explanation:
let the speed of one plane=x
speed of other plane=x+80
time=4 hrs
then 4x+4(x+80)=3800
4x+4x+320=3800
8x=3800-320
or 8x=3480
x=435
speed of one plane=435 m/h
speed of other plane=435+80=515 m/h
2.
Let he walks x hrs
then he take a taxi for 2-x hrs
4x+(2-x)50=31
4x+100-50x=31
-46x=-69
so he walks 3/2 hrs=1.5 hrs
travels by taxi=2-1.5=0.5 hrs
distance traveled by taxi=0.5×50=25 miles