Let (m × n) denote a matrix of size m × n. Find the size of the following product, or state that the product is not defined.(2 × 1)(1 × 2)
A. 2 × 2
B. not defined
C. 1 × 1
D. 1 × 2
Answer: A
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Solve the problem.A community college raises its tuition from $379 per course to 
per course. What is the percent increase? Round to the nearest tenth of a percent, if necessary.
A. 94.3% B. 93.9% C. 5.7% D. 6.1%
Obtain an equivalent system by performing the stated elementary operation on the system.Multiply the third equation by 1/4.3x - y + 4z + w = -104x - z - 2w = 34x - 8y + 3z - w = -20 x + 3y - 8z = 1
A. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 2y + 
z + 
w = -20
x + 3y - 8z = 1
B. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 2y + 
z - 
w = -5
x + 3y - 8z = 1
C. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 8y + 3z - w = -20
x + 3y - 8z = 1
D. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 2y + 
z - 
w = -20
x + 3y - 8z = 1
Find the real solutions of the equation by factoring.3x4 = 375x
A. {-5, 0, 5} B. {0, 3, 5} C. {0, 5} D. {0}
Sketch the logarithmic function.f(x) = log4 (x + 1) + 1
A. 
B. 
C. 
D. 