Answer:
478.5
Step-by-step explanation:
The 4 is less than 5 so it rounds down.
Answer:20Km
Step-by-step explanation:
3/10 + 9/20 =75%
75% of 80 = 60
oooooo 25% of 80 = 20.
Hope it makes
Answer:
17
Step-by-step explanation:
Well there can be two different solutions for this but i will choose the easier one. Obviously one requires a system of equations which obviously will involve a lot of thinking and some good algebra solving in order for them to solve.
As for hit and trial it is very easy, we can just keep adding the distance as we know they are in different directions. 60 + 61= 121. So 121 x 4.5 = 544.5 miles. So after around 4.5 hours they will be 544.5 miles apart if they continue at the same pace.
Let the second angle = X
The first angle = 2X+42 ( 42 more than 2 times the second angle)
Now you have 2x+42 + x = 90 ( first angle + second angle = 90)
2x + x = 3x
Now you have:
3x +42 = 90
Subtract 42 from both sides:
3x = 48
Divide both sides by 3:
x= 48/3
x = 16
The second angle = 16 degrees.
The first angle = 2(16) + 42 = 32+42 = 74 degrees