What is the solution to the combined inequalities – 7 < 3x – 1 < 8?
Please don't tell me to do my own homework cause its summer...schools out. im taking an online course and we need to complete a study guide that i don't have answers to.
2. Solve by factoring: 2x2 + 11x - 21 =
3. When x6 + 216 is factored completely, one of the factors is
4. What does the graph of the equation y = -7 look like?
5. Write the equation -2x + 5y = 3 in slope-intercept form
6.Solve 3x2 = 75
Thanks so much in advance.
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– 7 < 3x – 1 < 8
-6 < 3x < 9
-2 < x <3
2) 2x^2 + 11x - 21
= (x + 7)(2x - 3)
=> roots are: x = -7 , 3/2
3) x^6 + 216
= (x^2+6) (x^4 - 6x^2 + 36)
4) horizontal kine at y = -7
5) 5y = 2x + 3
y = 2/5*x + 3
6) 3(x^2 - 25) = 0
(x + 5)(x - 5) = 0
x = -5 , 5
1} -2<x<3 , {2} (2x-3)(x+7)=0 , x=3/2 or -7 , {3}(x2+6)(x4-6x2+36) , {4} horizontal line thro 7 on the y-axis , {5} y=2/5 x+3/5 , {6} x=5 or -5