Question

1,6 *(5x - 0,1) - 4 * (1,8x - 3), якщо х = - 4.5​

Answer 1

1,6 *(5x - 0,1) - 4 * (1,8x - 3), якщо х = - 4.5

підставимо х

1.6*(5-4.5-0.1)-4*(1.8-4.5-3)=23.44

1)5-4.5-0.1=0.4 -- 1.6*(0.4)-4*(1.8-4.5-3)

2)1.8-4.5-3=-5.7 -- 1.6*(0.4)-4*(-5.7)

3)4*(-5.7)=-22.8 -- 1.6*(0.4)-(-22.8)

4)1.6*(0.4)=0.64 -- 0.64-(-22.8)

5)0.64-(-22.8)=23.44

корону пожалуйста

Answer 2

To find the value of the expression 1.6 * (5x - 0.1) - 4 * (1.8x - 3) when x = -4.5, we can substitute the value of x into the expression and evaluate it.

Let's calculate step by step:

1. Substitute x = -4.5 into the expression: 1.6 * (5 * (-4.5) - 0.1) - 4 * (1.8 * (-4.5) - 3)

2. Simplify the calculations inside the parentheses: 1.6 * (-22.5 - 0.1) - 4 * (-8.1 - 3)

3. Continue simplifying: 1.6 * (-22.6) - 4 * (-11.1)

4. Evaluate the multiplications: -36.16 - (-44.4)

5. Subtract the values: -36.16 + 44.4

6. Calculate the final result: 8.24

Therefore, when x = -4.5, the expression 1.6 * (5x - 0.1) - 4 * (1.8x - 3) equals 8.24.