Answer:
2 km/h
Step-by-step explanation:
- distance = speed × time
- time = distance/speed
Let c represent the speed of the current of the river in km/h. Then the speed of the boat upstream is (10-c). In 3/4 hour, the distance traveled upstream is ...
... distance upstream = (3/4)·(10 -c)
The time taken to travel the same distance downstream is given as 3 hours. The speed in that direction is c, so we have ...
... 3 = distance upstream/c = (3/4)(10 -c)/c
Multiplying this equation by 4c, we get ...
... 12c = 3(10 -c)
... 15c = 30 . . . . . . . . add 3c
... c = 2 . . . . . . . . . . . divide by 15
The speed of the river current is 2 km/h.
A. Robert purchased a 36-inch piece of wood
Answer:
The side lengths are 32 units each
Step-by-step explanation:
Given
Required
The side lengths and missing angles
Since JKMN is as square, then:
-- all sides are equal
Collect like terms
Divide by -2
Substitute in
The missing angles can't be solved without an attachment.
<em>However, if the missing angles are the angles at the edges of the square, then they measure 90 degrees each (i.e. angles at right angle)</em>
It would equal 5.20043337 but rounded to the tenths would be 5.2 I think
Answer:
Step-by-step explanation:
Here you go mate
Step 1
6+2x<-18 Equation/Question
Step 2
6+2x<-18 Simplify
-24>2x
Step 3
-24/2=2x/2 Divide by 2
answer
x<-12
