The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).2x + 3y = 6
A. r(2 sin ? + 3 cos ?) = 6
B. 2 cos ? + 3 sin ? = 6r
C. 2 sin ? + 3 cos ? = 6r
D. r(2 cos ? + 3 sin ?) = 6
Answer: D
Mathematics
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A. (5, ?)
B. (-?, 5]
C. (-?, 5)
D. [5, ?)
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Factor the trinomial by grouping.20 + 63x2 - 73x
A. (9x - 4)(7x + 5) B. (9x + 4)(-7x + 5) C. (9x - 4)(7x - 5) D. prime
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Translate the sentence into an equation and solve it.Twenty-seven less than eight times a number is equal to five. Find the number.
A. 27 + 8n = 5, n = -4 B. 8n + 27 = -5, n = -4 C. 8n - 27 = 5, n = 4 D. 27 - 8n = 5, n = 3
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Solve each proportion for the given variable.
= 
Round to the nearest tenth.
A. 1.4 B. 72.5 C. 7.3 D. 0.1
Mathematics