Question

1,3a(2a-1)-16,4 Если a = 6,5

Answer 1

1,3*(2*6,5-1)-16,4

1,3*(13-1)-16,4

1,3*12-16,4

15,6-16,4

-0,8

Answer 2

1,3а(2а-1)-16,4, если а=6,5,то

1,3*6,5(2*6,5-1)-16,4

1) 2*6,5 -1= 12

2) 1,3*6,5=8,45

3) 8,45*12=101,4

4) 101,4-16,4=85

Ответ: 85

Answer 3

To calculate the expression 1,3a(2a-1)-16,4 when a is equal to 6.5, you can substitute the value of a into the expression and then simplify it:

1. Substitute a = 6.5: 1.3 * 6.5 * (2 * 6.5 - 1) - 16.4

2. Perform the calculations within the parentheses: 1.3 * 6.5 * (13 - 1) - 16.4

3. Continue to simplify: 1.3 * 6.5 * 12 - 16.4

4. Perform the multiplications: (1.3 * 6.5 * 12) - 16.4 101.4 - 16.4

5. Finally, subtract 16.4 from 101.4: 101.4 - 16.4 = 85

So, when a is equal to 6.5, the expression 1,3a(2a-1)-16,4 equals 85.