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andre [41]
3 years ago
13

What is the slope of the line that passes through the points (1,7) and (3,1)

Mathematics
2 answers:
Kipish [7]3 years ago
4 0

Answer: -3

Step-by-step explanation:

slope = m = y2-y1/x2-x1

                = 1-7 /3-1

                = -6/2

                =-3

Vera_Pavlovna [14]3 years ago
3 0
1-7/3-1
-6/2
-3
Therefore, the slope of the line that passes through these points is -3.
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The speed(S) of a car varies partly directly as its mass(M) and partly directly as the quantity (Q) of fuel in it. When the spee
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Answer:

S varies partly directly as M and Q.

S=C.

S=KMQ+C.

For the first one...

speed=80,m=220,Q=30.

80=K20×30+C.

80=600K+C......(I).equation one.

For the second one....

speed=60,m=300,Q=40.

60=K300×40+C.

60=12000K+C.....(ii). equation two.

Minus eqtn(I) from eqtn(ii).

80=600K+C.

- 60=12000K+C.

K=0.01754~0.018.

Substitute K=0.018 into eqtn(I).

80=600K+C

80=600×0.018+C.

80=10.8+C.

C=80-10.8=69.2.

The relation is S=0.018MQ+69.2

when speed is 100 and mass is 250 find the volume.

100=0.018×250×Q+69.2.

100=4.5Q+69.2.

4.5Q=100-69.2

4.5Q=30.8.

Q=30.8/4.5.

Q=6.8~7litres.

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