Assuming you meant square root of 90 it would be
90 equals 3 times the square root of 10
√90 = 3√10
Answer:
Its B since the decimals are lower than the data.
For this case we have a system of two equations with two variables:
Clear "o" from the first equation:

We substitute in the second equation:

ANswer:

-8x+18y=-12
24x-18y=18
16x=6
X=3/8
Y=3-12)/6
y=-3/2
The surface are of a rectangular prism is:
A=2(xy+xz+yz), where x,y, and z are the dimensions of the prism, in this case:
A=2(4*6+4*8+6*8)
A=2(24+32+48)
A=2(104)
A=208 cm^2