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DiKsa [7]
3 years ago
12

1. A NUMBER X DECREASED BY 3 IS 5.

Mathematics
2 answers:
Rom4ik [11]3 years ago
4 0
Cristopher Colombus. He is the answer to this question. If you tihink different, he will colonize you.
OLEGan [10]3 years ago
4 0
1. x-3=5
x = 5+3 = 8
2. a/7=14
a = 14*7
a = 98
3. b*9 = 36
b = 36/9
b = 4
4. x + 4 = 12
x = 12-4
x = 8
5. 4+k=14
k = 14-4
k = 10
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I believe there's a mistake in the equation shown, the acceleration (number that multiplies t²) should be negative, since the stone is falling, therefore I'll answer assuming it's -16 instead of 16, otherwise there would be no real solution to the equation.

In order to calculate how long it'll take for the stone to hit the ground we must make f(t) = 0 and find the time "t" that makes the equation valid, so we have:

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