Solve, graph, and write the solution in interval notation. 1) -3<x+3 <= 3

Filipinacws

Filipinacws

Answered question

2022-08-05

Solve, graph, and write the solution in interval notation
1. 3 < x + 3 3
2. 5 2 x 1 9
3. 22 4 y 2 < 10
4. 2 x < 8   and   x + 11 > 6
5. x 9   and   x + 2 < 2
6. 3 ( x + 2 ) 0   and   x + 9 1
7. x < 5   and   x 4 3
8. x + 1 4   and   x 6 2
9. x + 8 15   or   5 x 30
10. x 3 9   or   x + 4 3

Answer & Explanation

Donovan Shields

Donovan Shields

Beginner2022-08-06Added 13 answers

Step 1
1. 3 < x + 3 3. On adding -3 to all the 3 sides, we get 6 < x 0. Thus x belongs to (-6,0] . The graph is the part of 2nd and 3rd quadrants between the line x = 6 ( excluding this line) and the Y-Axis, i.e. the line x = 0 ( including this line).
2. 5 2 x 1 9. On adding 1 to all the 3 sides, we get 6 2 x 10. Now, on dividing all the 3 sides by 2, we get 3 x 5. Thus, x belongs to [3,5]. The graph is the part of 1st and 4th quadrants between the line x = 3 the line x = 5 (including both these lines).
3. 22 4 y 2 < 10. On adding 2 to all the 3 sides, we get 20 4 y < 8. Now, on dividing all the 3 sides by 4, we get 5 y < 2.Thus, y belongs to [-5,-2). The graph is the part of 3rd and 4th quadrants between the line y = 5( including this line) and the line y = 2 ( excluding this line).
4. 2 x < 8 and x + 11 > 6. On dividing both the sides of the 1st inequality by 2, we get x < 4. Further, on adding -11 to both the sides of the 2nd inequality, we get x > 5. Thus, x belongs to (-5, 4). The graph is the part of 1st and 2nd quadrants between the line x = 5 and the line x = 4(excluding both these lines).
5. x 9   and   x + 2 < 2. On adding -2 to both the sides of the 2nd inequality, we get x < 0. Thus, x belongs to [-9,0). The graph is the part of 1st and 2nd quadrants between the line x = 9 and the line x = 0 (including the 1st line but excluding the 2nd line).
Step 2
6. 3 ( x + 2 ) 0 and x + 9 1. On dividing both the sides of the 1st inequality by -3, we get x + 2 0. Now, on adding -2 to both the sides , we get x 2. Now, on adding -9 to both the sides of the 2nd inequality, we get x 8. The conditions x 2 and x 8 cannot be satisfied together. Hence there is no solution.
7. x < 5 and x 4 3. On adding 4 to both the sides of the 2nd inequality, we get x 7.The conditions x < 5 and x 7 cannot be satisfied together. Hence there is no solution.
8. x + 1 4 and x 6 2. On adding -1 to both the sides of the 1st inequality, we get x 3. On adding 6 to both the sides of the 2nd inequality, we get x 8. Hence x 8. Thus, x belongs to [ 8 , ). The graph is the part of the 1st and 4th quadrants to the right of the line x = 8( including this line).
9. x + 8 15   or   5 x 30. On adding -8 to both the sides of the 1st inequality, we get x 7. On dividing both the sides of the 2nd inequality by 5, we get x 6. Thus, x belongs to ( , 6 ] [ 7 , ). The graph is the part of xy plane to the left of the line x = 6 ( including this line) and to the right of the line x = 7 ( including this line).
10. x 3 9   or   x + 4 3. On adding 3 to both the sides of the 1st inequality, we get x 6. On adding -4 to both the sides of the 2nd inequality, we get x 1. Thus, x belongs to ( 6 ] ( 1 , ). The graph is the part of xy plane to the left of the line x = 6 ( including this line) and to the right of the line x = 1 ( including this line).

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