The roots to this equation i s either positive or negative five
Answer:
B. A water wheel in a dry river
Step-by-step explanation:
Work is said to be done when a force moves a body or an object through a certain distance in the direction of the force. Thus for work to be done, force and distance are required.
i.e Work done = Force x distance
It is measured in Joules.
Also, the work done by an object could be a measured of potential energy.
So that,
Work done = potential energy = mass x gravitational force x height
Considering the collage in the question, since the water wheel is in a dry river no work is done. Water wheel is a device that functions through the flow of water body, thus causing its rotation.
Rearrange y+49-7x into the form y=mx+c where m=gradient and c=y-intercept
y=7x-49
Therefore, the gradient is 7 and the y-intercept is -49
Is the second one
x^2+(y-2)^2=25