<span>let the angles be x and y.
as they are compliment
x+y=90
also given
x=7y
substituting value of x in first equation
7y+y=90
8y=90
therefore
y=11.25
x=7*y=78.75</span>
Y=6x, 2x+3y=-20
Substitution means just plugging in another equation equal to a single variable in order to solve for the other variable, and then the first. In this case, the equation being plugged in is y=6x, so 6x will be put in place of y in the equation 2x+3y=-20.
2x+3(6x)=-20
2x+18x=-20
20x=-20
x=-1
And then x=-1 can be plugged into the original equation to find y. (And, if you wish, into the y= equation to check it.)
2(-1)+3y=-20
-2+3y=-20
3y=-20+2
3y=-18
y=-6
And to check it, we plug the two into the original y= equation.
y=6x
-6=6(-1)
-6=-6
They are equal, so both check out.
x=-1, y=-6
Answer:
no clue buddy sry
Step-by-step explanation:
Answer:
h = 24 cm
Step-by-step explanation:
volume of water in the cylinder = volume of water in the rectangular base container
But ,
volume of cylinder = 
h
where: is the radius and h is the height.
volume of cuboid = length x width x height
= l x w x h
So that;

h = l x w x h
But, r =
=
= 9 cm, height of cylinder = 28 cm, length = 27 cm, width = 11 cm,
=
.
Thus,
x
x 28 = 27 x 11 x h
x 81 x 28 = 27 x 11 x h
7128 = 297h
h = 
= 24
h = 24 cm
The depth of the water in the container is 24 cm.