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:
77,700
Step-by-step explanation:
look at 690. since the nine is greater than 5 round to 700
I believe its... 21 × 10 = 210
Both x and y equal 2.
2•2=4 + 2•2=4
4+4=8
2+2=4
