Solve the equation for the indicated variable. Assume that the dimensions are such that matrix multiplication and addition are possible and that inverses exist when needed.Solve for Y: XY + ZY = A
A. Y = X-1(A - ZY)
B. Y = (X + Z)-1 A
C. Y = X-1(A - Z)
D. Y = A(X + Z)-1
Answer: B
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Write the quotients with positive exponents.
A. 4k B. 15 C. 4k2 D. 15k2
Subtract.46 - 5.84
A. 39.66 B. 51.84 C. 40.16 D. 40.26
A toy making company has at least 300 squares of felt, 700 oz of stuffing, and 230 ft of trim to make dogs and dinosaurs. A dog uses 1 square of felt, 4 oz of stuffing, and 1 ft of trim. A dinosaur uses 2 squares of felt, 3 oz of stuffing, and 1 ft of trim.It costs the company $1.30 to make each dog and $1.86 for each dinosaur. The company wants to minimize its costs. What are the constants in the corresponding dual model?
A. 4, 3 B. 300, 700, 230 C. 1, 2 D. 1.30, 1.86
Remove grouping symbols and simplify.3c - 4(4c - 4) + 5(2c - 4) + 5c - 6
A. 14c - 14 B. 2c - 14 C. 14c - 10 D. 2c - 10