Determine from its graph if the function is one-to-one.f(x) = 
A. Yes
B. No
Answer: A
Mathematics
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Let x represent one number and let y represent the other number. Use the given conditions to write a system of equations. Solve the system and find the numbers.The sum of two numbers is 20. If one number is subtracted from the other, their difference is 7. Find the numbers.
A. 12.5 and 7.5 B. 13.5 and 6.5 C. 14.5 and 5.5 D. 10.5 and 9.5
Mathematics
Use factoring to solve the equation.12d2 + 38d + 30 = 0
A. - 
, - 
B. - 
, - 
C. 
, 
D. 
, 
Mathematics
Solve the problem.In how many ways can 8 people be chosen and arranged in a straight line, if there are 11 people from whom to choose?
A. 990 B. 88 C. 1980 D. 6,652,800
Mathematics
Factor.15z2 - 14zy - 8y2
A. (15z + y)(z - 8y) B. (3z + 4y)(5z - 2y) C. (15z - 4y)(z + 2y) D. (3z - 4y)(5z + 2y)
Mathematics