Answer:
- 4 nickels
- 60 mph
Step-by-step explanation:
1. If all were dimes, the value would be $8.00. The value is actually $0.20 less than that. Replacing a dime by a nickel decreases the value by $0.05, so there must be $0.20/$0.05 = 4 nickels.
2. The total of the two speeds is the rate of closure: (420 mi)/(4 h) = 105 mi/h. The speed of the second car is found by subtracting the speed of the first car from this total:
105 mph - 45 mph = 60 mph
Answer:
Step-by-step explanation:
Keep in mind that 1 week is equivalent to 168 hours, or, alternatively, to (7 days)(24 hours per day). Thus, Answer 5 is correct.
Answer:
about 21.43 i hope this helps!!! :)
Step-by-step explanation:
1.42857143 is equal to 1 and 3/7
multiply that by 15
21.4285714286
Let me see if I can decipher that :P
3/(3x)+1/x+4=10/(7x) first we need to make all terms have a common denominator of 21x...
(21+21+84x)/(21x)=30/(21x) multiplying both sides by 21x leaves you with
21+21+84x=30 combine like terms on left side
42+84x=30 subtract 42 from both sides
84x=-12 divide both sides by 84
x=-1/7
180×0.05=9
So 5% of 180 is 9
