Answer: 
Step-by-step explanation:

Answer:
18 years
Step-by-step explanation:
the range for Africa is 80-38= 42 years
the range of Europe is 88-64
= 24; 42-24
=18.
Answer:
To determine the explicit rule for the arithmetic sequence of 20.5, 16, 11.5, 7, 2.5, ..., the following logical reasoning must be performed:
20.5 - 16 = 4.5
16 - 11.5 = 4.5
11.5 - 7 = 4.5
7 - 2.5 = 4.5
Thus, the explicit rule of the arithmetic sequence is that the numbers are gradually subtracted by 4.5, with which the next number of said sequence would be -2.
Answer:
29 for the skis and
25 for the snowboards
Step-by-step explanation:
478÷16 and
478÷19
Answer: 17.5 centimeters
Explanation: 5cm divided by 2 is 2.5cm. 2.5cm is equal to 1 km. So 2.5cm multiplied by 7km is 17.5cm