Step-by-step explanation:
Richard and teo age is 51 years old
You have to set these up in proportions to solve these problems. Then cross multiply and divide.
1. 3 = 15
12 = x
3x = 15 * 12
3x = 180
x = 180 ÷ 3
x = 60
Answer: 12 miles in 60 minutes (B)
2. 366 = 6
427 = x
366x = 427 * 6
366x = 2562
x = 2562 ÷ 366
x = 7
Answer: 427 miles in 7 hours (C)
Answer:
5. a) 2.140 + 1.725 = 3.865
b) 29.99 + 1.42 = 31.41
c) 6.157 - 1.009 = 5.148
6) 7.4 - 0.0022 = 7.2978 ✅
7.39 - 0.0012 = 7.3888
7. 140minutes / 2 hours and 20 minutes
When you divide a whole number by any number less than it the quotient (answer) is smaller than the first number.