Let x be the unknown speed, y the unknown distance.
distance equals speed times time.
"With" an 8kph current means our speed is x+8. 2 hours with an 8 kph current gets is a distance y:
y = 2(x + 8)
Against the current, speed x-8, took 3 hours to go y:
y = 3(x-8)
Equating,
2(x+8)=3(x-8)
2x + 16 =3x - 24
40 = x
Answer: 40 km/h
Check: 2(40+8)=96 km. 3(40-8)=3(32)=96 km. Equal, good.
Answer:
triangular prism
0.5 X 5 X 4 X 9 = 90 cubed cm
cuboid
6 X 5 X 20 = 600 cubed cm
triangular prism : cuboid
90:600
now simplify
both are divisible by 30
3:20
this cannot be simplified further
answer = 3:20
9514 1404 393
Answer:
2∛7
Step-by-step explanation:
Putting the expression in simplest form will factor cubes from under the radical.
![\displaystyle\sqrt[3]{56}=\sqrt[3]{2^3\cdot7}=\boxed{2\sqrt[3]{7}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%5Csqrt%5B3%5D%7B56%7D%3D%5Csqrt%5B3%5D%7B2%5E3%5Ccdot7%7D%3D%5Cboxed%7B2%5Csqrt%5B3%5D%7B7%7D%7D)
Answer:
7
Step-by-step explanation:
the square root of 49 is 7 since 7 x 7 = 49
