Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.2x - 3y + 5z = 7-7x - 2y + 3z = 46x + 3y - 2z = -10
A. 
B. 
C. 
D. No solution
Answer: C
Mathematics
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Find the distance d(A, B) between the points A and B.A = (1, 5); B = (-3, -2)
A. 
B. 3
C. 28
D. 
Mathematics
Solve.The city where Lu Na lives has a population of 2,273,468 people and an area of 155.2 square miles. What is the rate of number of people per square mile (i.e., the population density)?
A. 14,649 people/sq mi B. 0.0000683 people/sq mi C. 352,842,234 people/sq mi D. 15,381 people/sq mi
Mathematics
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.(1 × 1)(2 × 1)
A. 2 × 1 B. not defined C. 1 × 2 D. 2 × 2
Mathematics
Use a calculator to find the root or power rounded to six decimal places.130.1
A. 1.300000 B. 1.292392 C. 0.129239 D. 1.116123
Mathematics