Question

6a+7b 3a-4b,если:a=2,4,b=0,8

Answer 1

Ответ: 1) 20 2)4

Объяснение: 6×2,4+7×0,8=14,4+5.6 =20

3×2,4-4×0,8 = 7,2-3,4=4

Answer 2

To evaluate the expression 6a + 7b - (3a - 4b) when a = 2.4 and b = 0.8, we substitute the values into the expression and perform the calculations.

Given: a = 2.4 b = 0.8

Expression: 6a + 7b - (3a - 4b)

Substituting the values of a and b: 6(2.4) + 7(0.8) - (3(2.4) - 4(0.8))

Calculating each term: 14.4 + 5.6 - (7.2 - 3.2)

Simplifying further: 14.4 + 5.6 - 4

Finally: 20 - 4 = 16

Therefore, when a = 2.4 and b = 0.8, the value of the expression 6a + 7b - (3a - 4b) is 16.