Solve the linear equation symbolically.10(x - 40) = 20
A. 42
B. 38
C. 40
D. 20
Answer: A
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Use sum-to-product identities to rewrite the expression as a product.cos 6x + cos 4x
A. 2 sin 5x sin x B. 2 cos 5x sin x C. 2 cos 5x cos x D. 2 cos 5x
Use the given vectors to find the indicated expression.v = -5i + 3j + 3k, u = -2i + 3j + 5kFind v × (-4u).
A. -24i - 76j + 36k B. 24i + 76j - 36k C. -96i - 128j - 32k D. 6i + 9j - 9k
For those which are polynomial functions, find the degree, the leading term, and the leading coefficient.f(x) = 4x4 + 8 - 2
x7
A. Degree: 7, leading term: 2
x7, leading coefficient: 2
B. Degree: 4, leading term: -2
x7, leading coefficient: -2
C. Degree: 7, leading term: -2
x7, leading coefficient: -2
D. not a polynomial function
Decide if the system of equations in two variables is linear or nonlinear.
A. Nonlinear B. Linear