Write a matrix equation equivalent to the system of equations. 8w + 7x - 2y - z = -8 10x + 10y = -7-10w - 5x - y - 7z = 10 w - 8x + 10z = 10
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: A
Mathematics
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Indicate whether the function is one-to-one.{(6, -10), (7, -9), (5, -8), (3, -7)}
A. Yes B. No
Mathematics
Solve the problem.The population of a certain country is growing at a rate of 1.2% per year. How long will it take for this country's population to double? Use the formula 
which gives the time, t, for a population with growth rate k, to double. (Round to the nearest whole year.)
A. 60 years B. 59 years C. 57 years D. 58 years
Mathematics
Add.38 + 14
A. 42 B. 51 C. 52 D. 53
Mathematics
Solve the linear equation.-4x + 3 + 6(x + 1) = -7x + 6
A. 
B. 
C. 
D. 
Mathematics