Question

27 a - 49 b +2,4 х( 6 А +7 Б) - 49a, при а=10, b= - 2

Answer 1

Ответ:

Пошаговое объяснение:

=27а-49б+14,4а+16,8б-49а=-7,6а-

32,2б

Answer 2

To evaluate the expression when a = 10 and b = -2, we can simply substitute the values of a and b into the expression and perform the arithmetic operations. Let's proceed step by step:

Given expression: 27a - 49b + 2.4x(6a + 7b) - 49a

Substitute a = 10 and b = -2 into the expression:

Step 1: 27 * 10 - 49 * (-2) + 2.4 * (6 * 10 + 7 * (-2)) - 49 * 10

Step 2: 270 + 98 + 2.4 * (60 - 14) - 490

Step 3: 270 + 98 + 2.4 * 46 - 490

Step 4: 270 + 98 + 110.4 - 490

Step 5: 368 + 110.4 - 490

Step 6: 478.4 - 490

Step 7: -11.6

So, the value of the expression when a = 10 and b = -2 is -11.6.