Find, in the form y=mx +c, the equation of the straight line with the given gradient which passes through the given point. gradient 3, point (1,2)

gradient -1, point (5,3)

gradient 4, point (-2,-3)

for first

Step-by-step explanation:

here

slope (m)=3

point=(1,2)=(x1,x2)

equation of straight line

(y-y1)=m(x-x1)

or 3x-y+1=0

so y= 3x+1

now do all of the question like this

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.