III. Very short answer type questions:                                                    9 X 1 =  9 21.  Name the chemicals that are used to remove weeds.

22. Write the name of bacteria that helps in the formation of curd.

23.  which cell does not have nucleus?

24. Name some artificial fibres

25.  Name the element present in coal

3 / 5

26.  What is the unit for expressing the calorific value of a fuel?

27. What is meant by atmospheric pressure?

28.Name the device which work on the principle of multiple reflection

29. which part of the cells contains organells please I mark you brainlest ​

the answer is c

hope this !

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3