7 as a percentage of 20 just means what percentage of 20 is 7. To do this, we must divide 7 by 20. This is how you answer this. If you do so, then you will get 0.35. This shows that it is 35%. Note that when you get a decimal number, then you must multiply it by 100% to get the percentage equivalent of that number. Therefore, 7 as a percentage of 20 is 35%.
B) 50 miles per hour
C) 55 miles per hour
D) 60 miles per hour
into a decimal using an equivalent fraction show your steps
3.) r=2: 2+4/15= 6/15=2/5
2.) -3a-15=a: the fraction is negative. meaning the answer is negative, leaving a and c as choices. You can't square a since it is on different sides of the equation leaving you with c.
1.) answer is 5(x+4)=30: 3 is 2, meaning you would use the 2.
(Science) (15 pts)
1. My amplifier uses a filament that requires a maximum of 5 volts at a current of 15 amperes.
Calculate the resistance of the tube. (Round to no more than two numbers to the right of the decimal)
2. How many ohms of resistance are present in a light bulb that draws 2 amperes at 120 volts?
3. A 250 watt radio will draw how many amps when operating on 240 volts? (Round to no more than two numbers to the right of the decimal)