Which expressions represent the perimeter of the rectangle formed by all the tables together? Choose all that apply. A 10x - 12 + x + 10x - 12 + x B 8(2.5x - 3) + 5x C 2(10x - 12) + 2x D 412.5x - 3) + x E (11x – 12) Grade 7 Lesson 15 Writing Linear Expressions Curriculum Associates, LLC Copying permitted for classroom use.

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step-by-step explanation:

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

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a