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kupik [55]
3 years ago
13

Solve (4 - x ≤ -1) ∩ (2 + 3x ≥ 17).

Mathematics
2 answers:
velikii [3]3 years ago
6 0
The upside down 'U' shape means intersection which means find the terms that are in both of the groups so  for example (2,4,6,7)<u /> (upside down U shape) (3,5,7) the answer would be (7) because 7 is in both of the sets
<u><</u> means less than or equal to
<u>></u> means more than or equal to
so so 4-x<u><</u>-1
if we convert this to x=something then
add x to both sides
4<u><</u>x-1
add 1 to both sides
5<u><</u>x

the second equation is 2+3x<u>></u> 17
subtract 2 from both sides
3x<u>></u>15
divide both sides by 3
x<u>></u>5

so the intersection of 5<u><</u>x and x<u>></u>5 is 5<u><</u>x<u>></u>5 or 5<u><</u>x so the solution set is x={x|x<u>></u>5} or any number more than or equal to 5 will work<u />
belka [17]3 years ago
3 0
4-x \leq -1\ \ \ | subtract\ 4\ \ \ \ \ and\ \ \ \ 2+3x \geq 17\ \ \ | subtract\ 2\\\\&#10;-x \leq -5\ |*(-1)\ \ \ \ and\ \ \ \ 3x \geq 15\ \ | divide\ by\ 3\\\\&#10;x \geq 5\ \ \ \ \ and\ \ \ \ x \geq 5\\\\&#10;Solution\ is\ x\in[5,+\infty)
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Carefully meaning of formula used in attachment to the solution they are the same.

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