180 / 2 Mastery
Solutions t
Graph y = 4x - 9.
y

0% 13 day
Take
9
8
7-
6+
5-
Intercepts
CO
N
3
2
1+
+ 3
2 3 4 5 6 7 8 9
-9 8 7 6 5 4 3 2
Slope
ON
-2
-3+
-4+
-5
-6+
-7+

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

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Which statement shows that 6.24 is a rational number? a. 6.24 = 6.242424 b. 6.24 = 6.24 c. 6.24 = 68⁄33 d. 6.24 = 66⁄25