2(4u-5)=70
divide 2 from both sides
4u-5=35
add 5 to both sides
4u=40
divide 4 from both sides
u=10
Simple, first, change 70% into 0.7
thus,
21= 0.7*n
21/0.7=0.7n/0.7
30=n
Thus, your answer, is 30.
You drove for half the time at 60mph and the other half the time at 30mph.
To find your average speed, we add 60 and 30 then divide them by two (because you drove at 2 different speeds). 60+30 = 90 and 90/2 = 45 so 45 miles per hour is your average speed.
Note: Velocity implies a direction to the force and there is no direction in this question, just speed. Without direction we cannot use velocity, only speed.
Answer: 10
Step-by-step explanation:
1 triangle per side of the decagon.
The percentage of 4c that's the expression 0.04c will be is 1%.
<h3>How to calculate the percentage?</h3>
From the complete information, we are told to calculate the percentage of 0.04c from 4c.
This will be calculated thus:
= 0.04c/4c × 100
= 0.01
= 1%
Therefore, the percentage is 1%.
Learn more about percentages on:
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