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3 years ago

What is the slope of the line?

Mathematics

1 answer:

Savatey [412]3 years ago

8 0

Answer:

C. -3

Step-by-step explanation:

Start from (-1,4) drop down -6 spots then move over 2 spot to end up at (1,2). This is the same as writing -6/2 which equals -3.

If you start from other point (1,2) you'll have to move up 6 then back -2 to get to (-1,4) which is also -6/2 like above and slope is still -3.

Remember y = mx + b

m is the slope and with above example -6/2 top number is rise which move up/down and bottom number is run which move left/right.

Another way of solving it is:

(y2 - y1) / (x2 - x1)

4 - (-2) / -1 - 1

6 / -2

-3

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Katarina [22]

Answer:

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3 years ago

a submarine travels 90 kilometers in 4 hours find the submarines rate of speed in kilometers per hour

defon

Answer:

22.5

Step-by-step explanation:

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2 years ago

in the figure below trianglePQM and triangleQRP are right triangles. the measure of lineQM is 6 and the measure of lineQP is 8.

Kipish [7]

Answer:

Option 4 is correct. The length of PR is 6.4 units.

Step-by-step explanation:

From the given figure it is noticed that the triangle PQR and triangle MQR.

Let the length of PR be x.

Pythagoras formula

$hypotenuse^2=base^2+perpendicular^2$

Use pythagoras formula for triangle PQM.

$PM^2=QM^2+PQ^2$

$PM^2=(6)^2+(8)^2$

$PM^2=36+64$

$PM^2=100$

$PM=10$

The value of PM is 10. The length of PR is x, so the length of MR is (10-x).

Use pythagoras formula for triangle PQR.

$PQ^2=QR^2+PR^2$

$(8)^2=QR^2+x^2$

$64-x^2=QR^2$ .....(1)

Use pythagoras formula for triangle MQR.

$MQ^2=QR^2+MR^2$

$(6)^2=QR^2+(10-x)^2$

$36=QR^2+x^2-20x+100$

$36-x^2+20x-100=QR^2$ .... (2)

From equation (1) and (2) we get

$36-x^2+20x-100=64-x^2$

$20x-64=64$

$20x=128$

$x=6.4$

Therefore length of PR is 6.4 units and option 4 is correct.

3 0

3 years ago

Please help me with my homework

Alona [7]

so for A it is 16 times as large because the area is 3*3 which is 9 but since it is a triangle the area is halved and is 4.5 and divide 72 by 4.5 which gives us 16

then for b I believe that the scale factor is 4

and for C it is asking for the bottom side of the scaled copy not of triangle A and 4*3=12 so the bottom is 12

ok now its complete =)

4 0

3 years ago

Suppose you have a bag containing 2 black marbles and 3 red marbles. You reach into the bag, select a marble, see what color it

sweet [91]

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3 years ago