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Mathematics
2 September, 06:53
7=-2.7x^2+30x+6.5 round nearest 10th
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Dalia Marquez
2 September, 07:22
0
0, 11.1 correct to the nearest tenth.
Step-by-step explanation:
7=-2.7x^2+30x+6.5
2.7x^2 - 30x + 0.5 = 0
Using the quadratic formula:
x = [-30 + / - sqrt ((-30^2 - 4 * 2.7 * 0.5) ] / 5.4
= 0.017, 11.094.
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