Question

-0,6(1,6b-5)-(2,9b-8)-4(4-1,5b)упростите выражение если b=-9/13​

Answer 1

Відповідь:

-6.481

Покрокове пояснення:

-0.96ь+3-2.9ь+8-16+6ь=2.14ь-5

Answer 2

To simplify the expression, substitute the value of b with -9/13 and perform the calculations step by step:

Let b = -9/13.

Expression: -0.6(1.6b - 5) - (2.9b - 8) - 4(4 - 1.5b)

Step 1: Replace b with -9/13

-0.6(1.6(-9/13) - 5) - (2.9(-9/13) - 8) - 4(4 - 1.5(-9/13))

Step 2: Calculate the values inside the parentheses

-0.6(-14.4/13 - 5) - (-26.1/13 - 8) - 4(4 + 13.5/13)

Step 3: Continue simplifying

0.6(14.4/13 + 5) + (26.1/13 - 8) - 4(4 + 13.5/13)

Step 4: Perform addition/subtraction inside parentheses

0.6(14.4/13 + 65/13) + (26.1/13 - 104/13) - 4(52/13 + 13.5/13)

Step 5: Continue calculations

0.6(79.4/13) + (-77.9/13) - 4(65.5/13)

Step 6: Simplify further

47.64/13 - 77.9/13 - 262/13

Step 7: Perform addition/subtraction

(47.64 - 77.9 - 262)/13

Step 8: Final result

(-292.26)/13

Finally, the simplified expression is:

-22.48

So, when b = -9/13, the expression -0.6(1.6b - 5) - (2.9b - 8) - 4(4 - 1.5b) simplifies to -22.48.