9. trust
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Answer:
As i multiplied i got the answer like this
18x^3+6x^2+14x-72
Answer:
x intercept = -3
x intercept = 1
x intercept = 2
Step-by-step explanation:
The x-intercepts are where the graph crosses the x-axis
Value of x when y = 0
crosses the x-axis at (negative 3, 0), (1, 0), and (2, 0),
x intercept = -3
x intercept = 1
x intercept = 2
x y
-3 0
-1.5 13
0 6
1 0
1.5 -1
2 0
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18. s = 5r^2 + 7......making r the subject
s - 7 = 5r^2
(s - 7) / 5 = r^2...by taking the sqrt of both sides, it eliminates the ^2
( sqrt (s-7)/5) = r
19. h = ut - 1/2gt^2....u = 100, t = 1 4/5(or 9/5)...g = 6.4
h = (100)(9/5) - 1/2(6.4)(9/5^2)
h = 180 - 1/2(6.4)(3.24)
h = 180 - 3.2(3.24)
h = 180 - 10.368
h = 169.632 or 169 79/125
20. sorry..do not know this one
1 box = 2 recorders
3 boxes = 6 recorders
5+6 = 11 recorders
