Find the value of d, the length of the diagonal across the square. If necessary, round your answer to 2 decimal places.

Step-by-step explanation:

Use Pythagorean theorem,

d² = 4² + 4²

   = 16 + 16

d² = 32

d = √32

d = 5.67 units

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step-by-step explanation:

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u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w