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Mathematics 7 Online
OpenStudy (abbycross167):

Can someone please show me the steps to answer this question? Which values of x satisfy the inequality –(7/3)[x+(9/28)]<20?

OpenStudy (zacksibayan):

-7/3 x + (-7/3 * 9/28) < 20 -7/3x -3/4 < 20 -7/3 x < 20 + 3/4 -7/3 x < 83/4 x< (83/4)(-3/7) x< -249/28 or -8.893

OpenStudy (phi):

zack forgot that multiplying by a negative number cause the relation operator < to flip to >

OpenStudy (abbycross167):

@zacksibayan @phi my answer choices are a. x < -8 25/28 b. x < -8 ¼ c. x > -8 25/28 d. x > -8 ¼

OpenStudy (abbycross167):

would -249/28 simplify to -8 25/28?

OpenStudy (phi):

you divide 28 into 249 (ignore the minus sign. just remember the answer will be negative) 28 goes into 249 8 times. but there is a remainder to find the remainder do 8*28= 224 we need to get to 249 so the remainder is 249-224= 25

OpenStudy (phi):

you write the remainder divided by the divisor i.e. 25/28 so yes -8 25/28 so that narrows you to two choices. unfortunately zack did not flip the relation sign when he solved the problem, so his final answer is not correct.

OpenStudy (abbycross167):

oh ok. Thank y'all for helping me!!!

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