Find an equation for the circle with the given center C and radius r.Center (0, 0), radius 

A. x2 + y2 = 1
B. x2 + y2 = 
C. x2 + y2 = 4
D. x2 + y2 = 2


Answer: D

Mathematics

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Solve. Write a mixed numeral for the answer.Peter must practice the piano 12 hours per week. He has already practiced 2 hours. How many more hours does he need to practice?

A. 9 hr
B. 9 hr
C. 10 hr
D. 8 hr

Mathematics

Solve.A clothing company sells jackets for $130 per jacket. The company's fixed costs are $5000 and the variable costs are $120 per jacket. Use a graph to determine the break-even point for production.

A. (1000, 65,000) B. (500, 130,000) C. (1000, 130,000) D. (500, 65,000)

Mathematics

Find each product. Write the result in the form a + bi.(7 - 2i)(5 - 6i)

A. 23 + 52i B. 12i2 - 52i + 35 C. 23 - 52i D. 47 + 32i

Mathematics

Determine the slope and the y-intercept. Use the slope and the y-intercept to graph the equation.y = x + 5

A. slope: ; y-intercept: (0, 5)

B. slope: ; y-intercept: (0, -5)

C. slope: 2; y-intercept: (0, -5)

D. slope: ; y-intercept: (0, 5)

Mathematics