Solve the equation.
- 
= 1
A. 
B. 
C. ?
D. 
Answer: D
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Find the intersection.9x + 8y - 9z = -3, -7x - 5y + 7z = 10
A. x = 11t + 65, y = 0t + 69, z = -11t
B. x = 121t + 65, y = 0t - 69, z = -11t
C. x = -11t - 65, y = 0t + 69, z = -11t
D. x = 11t - 
, y = 0t + 
, z = 11t
Solve.The rate of return of certain investments increases as the risk factor of the investment increases. An investment with a risk factor of 2 has a rate of return of 5.0%. An investment with a risk factor of 18 has a rate of return of 20.0%. What is the average rate of return per unit of risk?
A. 0.72% per unit risk B. 0.94% per unit risk C. 1.38% per unit risk D. 1.07% per unit risk
Translate the phrase into a mathematical expression and then find the result.The sum of $83 and 
A. 83 - 45; $57 B. 83 + 45; $128 C. 83 + 45; $124 D. 83 - 45; $38
Solve the problem.The stock market gained 22 points on Tuesday and lost 37 points on Wednesday. Find the difference between these changes.
A. -15 points B. 59 points C. 15 points D. -59 points