Use algebra tiles to find the difference. Let one white tile equal +1 and one black tile equal –1. 6 – (–9) A. 15; B. 13; C. –3;
D. 15;
2 answers:
Answer:
The correct option is A.
Step-by-step explanation:
Let one white tile equal +1 and one black tile equal –1. It means the sum of one white tile and 1 black tile is 0.
We need to find the value of 6-(-9).
6 means 6 white tiles.
-9 means 9 black tiles.
-(-9) means 9. It represents 9 white tiles.
Now, we have total 15 white tiles.
6-(-9)= 6+9 = 15
The value of 6 – (–9) is 15. Therefore the correct option is A.
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A) The signs of the first derivative (g') tell you the graph increases as you go left from x=4 and as you go right from x=-2. Since g(4) < g(-2), one absolute extreme is (4, g(4)) = (4, 1).
The sign of the first derivative changes at x=0, at which point the slope is undefined (the curve is vertical). The curve approaches +∞ at x=0 both from the left and from the right, so the other absolute extreme is (0, +∞).
b) The second derivative (g'') changes sign at x=2, so there is a point of inflection there.
c) There is a vertical asymptote at x=0 and a flat spot at x=2. The curve goes through the points (-2, 5) and (4, 1), is increasing to the left of x=0 and non-increasing to the right of x=0. The curve is concave upward on [-2, 0) and (0, 2) and concave downward on (2, 4]. A possible graph is shown, along with the first and second derivatives.
The sign of the first derivative changes at x=0, at which point the slope is undefined (the curve is vertical). The curve approaches +∞ at x=0 both from the left and from the right, so the other absolute extreme is (0, +∞).
b) The second derivative (g'') changes sign at x=2, so there is a point of inflection there.
c) There is a vertical asymptote at x=0 and a flat spot at x=2. The curve goes through the points (-2, 5) and (4, 1), is increasing to the left of x=0 and non-increasing to the right of x=0. The curve is concave upward on [-2, 0) and (0, 2) and concave downward on (2, 4]. A possible graph is shown, along with the first and second derivatives.