Question

5(2a+5)-(11+2a) при a= - 0,45

Answer 1

10а+25-11-2а=8а+14=8×(-0.45)+14=-3.6+14=10.4 ИЗВЕНИТЕ ЕСЛИ НЕ ПРАВИЛЬНО

Answer 2

To evaluate the expression 5(2a+5)-(11+2a) when a = -0.45, follow these steps:

Step 1: Replace 'a' with the given value (-0.45) in the expression.

5(2(-0.45) + 5) - (11 + 2(-0.45))

Step 2: Simplify the expression within the parentheses.

5(-0.9 + 5) - (11 - 0.9)

Step 3: Continue simplifying inside the parentheses.

5(4.1) - 10.1

Step 4: Calculate the multiplication and subtraction.

20.5 - 10.1

Step 5: Finally, subtract the two values.

Result = 10.4

So, when a = -0.45, the expression 5(2a+5)-(11+2a) equals 10.4.