Which expressions are equivalent to the given expression? Select two options.
(–2.4a – 1.8b) – (–3.8a – 4.4b) + (2.0a + 3.0b)
A. 3.4b – 3.2a
B. 3.4a – 3.2b
C. 5.6b + 3.4a
D. 3.2b + 3.4a
E. 3.4a 5.6b

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

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Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)