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Which of the following correctly expresses Q as the subject of e = iR + Q/C.
e = iR + Q/C
Multiply by C:
Ce = CiR + Q
Q = Ce – CiR
Consider the equation 2x/3 – 4 = 5x/2 + 1.
Which of the following would be a correct step in solving this equation?
2x/3 – 4 = 5x/2 + 1
2x/3 = 5x/2 + 1 + 4
2x/3 = 5x/2 + 5
Simplify 6w^4 x (1/3)w^2
6w^4 x (1/3)w^2 = 2w^6
Which of the following correctly expresses r as the subject of v = √(mr/π)?
v = √(mr/π)
v^2 = mr/π
πv^2 = mr
r = πv^2/m
Which equation correctly shows r as the subject of S = 800(1 – r)?
S = 800(1 – r)
S = 800 – 800r
800r = 800 – S
r = (800 – S)/800
Which of the following expresses 2x^2(5 – x) – x(x – 2) in its simplest form?
2x^2(5 – x) – x(x – 2) = 10x^2 – 2x^3 – x^2 + 2x
= –2x^3 + 9x^2 + 2x
Which of the following correctly expresses c as the subject of E = mc^2 + p?
E = mc^2 + p
mc^2 = E – p
c^2 = (E – p)/m
c = ± √[(E-p)/m]