There are four 50 gallons water tanks at a farm. each tank has had 4/5 of the water used. how much water is left in the tank all together

40 gallons of water

Step-by-step explanation:

50 gallons times 4 tanks is 200 gallons. 4/5 of 50 is 40 so you subtract 40 from 50. That makes 10 for 1 tank. When you multiply that by 4 tanks, it makes 40 gallons.

b. astronomers

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

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