Question

7.8а + 2.3а - 5a при а =6

Answer 1

(7,8 * 6) + (2,3*6) - 5*6 = 46,8 + 13,8 - 30= 30,6

Answer 2

To evaluate the expression 7.8a + 2.3a - 5a when a = 6, we substitute the value of a into the expression and perform the calculations.

Substituting a = 6:

7.8a + 2.3a - 5a = 7.8(6) + 2.3(6) - 5(6) = 46.8 + 13.8 - 30 = 60.6 - 30 = 30.6

Therefore, when a = 6, the value of the expression 7.8a + 2.3a - 5a is 30.6.