Question #347206

Solve the inequalities. Give your answer in interval notation, and indicate the answer geometrically on the real-number line.

a) t + 6 ≤ 2 + 3t

b) 3(2 – 3x) > 4(1 – 4x) 


1
Expert's answer
2022-06-03T05:49:58-0400

a) t+62+3t,t + 6 ≤ 2 + 3t,

t3t26,t-3t\leq2-6, (we have got all the terms with the variable t on the left and the numbers on the right)

2t4,-2t\leq-4, (we have simplified the both sides)

t42,t\geq\frac{-4}{-2}, (We have divided by the negative number, so we had to change the direction of the inequality)

t2,t\geq2,

in interval notation: t[2,),t\in[2, \infty),

the interpretation on the real-number line:




b) 3(23x)>4(14x),3(2 – 3x) > 4(1 – 4x),

69x>416x,6-9x>4-16x,  (we have removed parentheses)

9x+16x>46,-9x+16x>4-6, (we have got all the terms with the variable x on the left and the numbers on the right)

7x>2,7x>-2, (we have simplified the both sides)

x>27,x>-\frac{2}{7}, (We have divided by the positive number, so we hadn't to change the direction of the inequality)

in interval notation: x(27,),x\in(-\frac{2}{7}, \infty),

the interpretation on the real-number line:


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