Question

1/3(2a-9)-1/2(5b+4) и найдите его значение при а=4 1/2 и b =4/15

Answer 1

Ответ:

Пошаговое объяснение:

1/3(2a-9)-1/2(5b+4)  = 2/3a - 3 - 5/2b - 2 = 2/3a - 5/2b - 5

при а=4 1/2 и b =4/15

2/3 * 4 1/2 - 5/2 * 4/15 - 5 = 2/3 * 9/2 - 5/2 * 4/15 - 5 = 3 - 2/3 - 5 = -2 2/3

Answer 2

To find the value of the expression 1/3(2a-9) - 1/2(5b+4) when a = 4 1/2 and b = 4/15, we simply substitute these values into the expression and perform the calculations.

Step 1: Substitute the values of a and b into the expression: a = 4 1/2 = 4 + 1/2 = 9/2 b = 4/15

Step 2: Evaluate the expression: 1/3(2a-9) - 1/2(5b+4) = 1/3(2 * (9/2) - 9) - 1/2(5 * (4/15) + 4)

Step 3: Simplify the expression: = 1/3(18/2 - 9) - 1/2((20/15) + 4) = 1/3(9) - 1/2(20/15 + 60/15) = 1/3(9) - 1/2(80/15) = 3 - 40/15 = 3 - 8/3 = 9/3 - 8/3 = 1/3

So, the value of the expression when a = 4 1/2 and b = 4/15 is 1/3.