Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.The three angles in a triangle always add up to 180°. If one angle in a triangle is 63° and the second is 2 times the third, what are the three angles?
A. 63°, 76°, 41°
B. 63°, 78°, 39°
C. 63°, 77°, 40°
D. 63°, 79°, 38°
Answer: B
Mathematics
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Provide the proper response.Without graphing, justify why x2 + 9 - 6x - 8y + 32 = 0 is the equation of a parabola.
What will be an ideal response?
Mathematics
Solve and simplify.
? x = 171
A. 23 B. 385 C. 171 D. 76
Mathematics
Write a percent proportion that could be used to answer the question. Do not solve. 22% of $65 is how much money?
A. 
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B. 
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C. 
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D. 
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Mathematics
Write the whole number in standard form.Four thousand, eight hundred eighty-five
A. 4085 B. 400,885 C. 4885 D. 40,885
Mathematics