Mathematics, 28.01.2020 19:03 roxygirl8914
Justify each step of the proof.
conjecture: if 2(x2 + 5) = 60, then x is 5 or –5.
1. 2(x2 + 5) = 601. given
2. 2x2 + 10 = 602.distrubutive law
3. 2x2 = 503. equals subtracted from equal, remainders are equal.
4. x2 = 254. equals divided by equals quotients are equal.
5. x = ±55. square roots of equals are equal.
Answers: 2
Mathematics, 21.06.2019 18:20
What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)
Answers: 2
Mathematics, 21.06.2019 18:30
The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?
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Justify each step of the proof.
conjecture: if 2(x2 + 5) = 60, then x is 5 or –5.
...
conjecture: if 2(x2 + 5) = 60, then x is 5 or –5.
...
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