-21
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depends ...... a. 7(-3) means 7 times (negative 3) b. (-1) negative # c. -(9) the opposite of nine
3 times 10 to the 8th power divided by 7 times 10 to the negative 7th power equates to: 4.28571428571
-7 -5 * 2=-10 -10 + 3=-7
-3x + 7 < -3 -3x < 4 x > -(4/3) ■
6 times -7 is -42