To solve: 9 + 2 + 42 × 5 − 1
=9+2+(42×5)-1
=9+2-1+(42×5)
=10+210
=220
To solve: (9 + 2) + 42 × (5 − 1)
=11+(42×4)
=179
One of the thing we should note is that multiplication always comes first, or we might get the wrong answer.
Hope it helps!
Answer:
The distance the marina can travel = = 48 miles
Step-by-step explanation:
The rate going out against the current is = u - v = 20
The rate going out with the current is = u + v = 30
Let the distance traveled by the motorboat =
Total time the boat can travel = 4 hours
⇒ Total time = ( Time taken by boat to go against the current ) + ( Time taken by boat to go with the current )
⇒ 4 =
⇒ 4 =
⇒ 4 =
⇒ = 48 miles
This is the distance the marina can travel.