Solve the equation in the complex number system.x2 + 49 = 0
A. {-7, 7}
B. {7i}
C. {-7i, 7i}
D. {7}
Answer: C
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Solve and, when appropriate, round the answer to the nearest tenth.The radius of a sphere depends on its surface area, S, and is given by the formula r = 
.What is the surface area of a sphere with radius of 6.7 inches?Use 3.14 for ?.
A. 21 square inches B. 563.8 square inches C. 141 square inches D. 84.2 square inches
Solve using the elimination method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.
x - 
y = 1
x + 
y = 3
A. 
B. 
C. 
D. No solution
The circle graph below shows the number of pizzas consumed by college students in a typical month. Use the graph to answer the question. 
If State University has approximately 28,000 students, about how many would you expect to consume 5-6 pizzas in a typical month?
A. 5040 students B. 504 students C. 952 students D. 9520 students
Find the x-intercept(s) if they exist.6x2 = 42x
A. 0 B. 0, 7 C. 21 D. 7