The cyclist rode for hours at a speed of 12 km / h and 2 hours at a speed of 8 km / h.

The cyclist rode for hours at a speed of 12 km / h and 2 hours at a speed of 8 km / h. How many kilometers did the cyclist travel during this time? Write an expression for solving the problem and find its value for a = 1, 2, 4

Let’s compose an expression for solving the problem: 12 * a + 8 * 2 = 12a + 16
a) If a = 1, then 12 * 1 + 8 * 2 = 12 + 16;
12 + 16 = 28;
answer: 28 (km)
b) If a = 2, then 12 * 2 + 16 = 24 + 16;
24 + 16 = 40;
answer: 40 (km);
c) If a = 4, then 12 * 4 + 16 = 48 + 16;
48 + 16 = 64;
answer: 64 km.
Answer: the cyclist traveled with a = 1 28 km, with a = 2 40 km, with a = 4 64 km.