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sgslayerkingminecraf
28.12.2019 •
Mathematics
Find the solution set for the following problem. 5 diminished by 3 times a number is at most 11.
a) {x | x ≤ -2}
b) {x | x ≥ -2}
c) {x | x ≤ 2}
d) {x | x ≥ 2}
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Ответ:
B) {x | x ≥ -2}
Step-by-step explanation:
We have to find a number that when subtracted 3 times from number 5 will get a result that is ≤ 11. We can make the following inequality out of what we know:
5 - 3x ≤ 11
We just have to isolate x:
5 - 3x ≤ 11
5 - 11 ≤ 3x
-6 ≤ 3x
-2 ≤ x
x ≥ -2
And you can verify it... by testing with
-1 ⇒ 5 - (-3) ≤ 11, 8 ≤ 11 YES
and -3 ⇒ 5 - (-9) ≤ 11, 14 ≤ 11 NO
Ответ: