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Stells [14]
3 years ago
6

 PLZ HELP EASY PLZ HELP ME Two vertices of a right triangle have the coordinates (−2, 5) and (9, 5) .

Mathematics
2 answers:
Sever21 [200]3 years ago
6 0
I say its 11. Since the distance between the two points is 11. 

ivann1987 [24]3 years ago
3 0

Answer:


Step-by-step explanation:


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A boat travels at 15 km/hr in still water. In travelling 45 km downstream from town A to town Bit completes the journey in 75 mi
Crank
Let the speed of river be x   km/hr down stream.

Time = Distance / speed

Since river flows downstream,  speed of boat down stream = Speed of boat + speed of river =  (15 + x).

 Since river flows downstream,  speed of boat upstream = Speed of boat - speed of river =  (15 - x).

Time Upstream - Time Downstream = 75 minutes

Time Upstream =  45 / (15 - x)

Time Downstream =  45 / (15 + x)

75 minutes = 75/60  =  5/4 hours

Time Upstream - Time Downstream = 75 minutes = 5/4 hours

45 / (15 - x)    -    45 / (15 + x)  = 5/4          Divide both sides by 45

1 / (15 - x)    -    1 / (15 + x)  = (5/4)*(1/45)

 1 / (15 - x)    -    1 / (15 + x)  = 1/36

((15 + x) - (15 -x)) / (15-x)(15+x)  = 1/36

(15 +x - 15 +x) / (15-x)(15+x)  =  1/36

  2x / (15-x)(15+x)  = 1/36

 (15-x)(15+x) = 2x*36

(15-x)(15+x) = 72x

225 - x² = 72x

0 =  x² + 72x -225

x² + 72x -225 = 0            This is a quadratic function, use a calculator that can solve the function, by inputting the function.

x = 3, or -75.  Since we are solving for speed, we can not have negative values.

x = 3 is the only valid solution.

Speed of the river =  3 km/hr  downstream.

Copyright.
7 0
3 years ago
Solve for x in the diagram below (plz no links)<br>​
Kryger [21]

Answer:

4X+50=150

-50 on both sides

4x=100

divided by 4 on both sides

x=25

Step-by-step explanation:

8 0
2 years ago
Y = -2x + 5 &amp; y = x - 1<br> Use the Equal Values Method to solve for x and y
ikadub [295]
X-1=-2x+5
X=2

Y=-2(2) + 5
Y= 1
4 0
3 years ago
Please help me solve this
NikAS [45]

Answer:

uhhhhhhhhhhhhhhhhh

Step-by-step explanation:

i wish i knew

6 0
2 years ago
Eric measured the height of a window frame as 5.43 feet, but the actual height was 6 feet. What is the percentage of error in Er
ivolga24 [154]
To find percent error it's the absolute value of
Actual-Experimental divided by The actual times 100
1) 6-5.43
2) 0.57/6
3) 0.095x100
4)9.5%
5 0
3 years ago
Read 2 more answers
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