2x - 8 + 3x + 2 = 4x + 10 + 3x - 6 = 39
C.)
Since the ideal width is 7 cm and can vary by most 0.3 cm. This means the range is 6.7 cm to 7.3 cm Absolute value means that any negative number becomes positive. l 6.7 -7 l and l 7.3 - 7 l both equal 0.3 cm
l w - 7 l </= 0.3
You multily 9 by 5 since there is 5 wholes and those are divided into 9ths so 9by 5