Two pieces of wood, 123cm and 215cm in thickness are to be nailed together. If the nails that can be bought are a whole cm in length, at least what length of nail should be bought for the nail to go through both pieces?

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

answer: b

step-by-step explanation:

27 +27 or 27times 2=54

the diffrence is 0

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c. histogram

step-by-step explanation: