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2 answers:
Part A: x = 6 makes <span> 4x − 5 ≤ 19 true, because 4(6) = 24 - 5 = 19. The other one does not have a less than <em>equal</em> sign, and so is false (for 19 = 19) Part B: 4x + 3 = 23 Isolate the x. First subtract 3 from both sides 4x + 3 (-3) = 23 (-3) 4x = 23 - 3 4x = 20 divide 4 from both sides to isolate the x 4x/4 = 20/4 x = 20/4x = 5 5 is your answer hope this helps </span>
1) 4x-5≤19 If we substitute, x= 6 We get 4*6-5= 19, so it is going to be true for, 4x-5≤19, 4*6-5≤19, 19≤19, True. But when we substitute in 4x-5<19, 4*6-5<19, 19<19 False, because 19=19. 2) 4x+3 = 23 4x+3 - 3 = 23 - 3 4x =20 4x/4 =20/4x=5 5 makes this equation true. Check: 4*5+3 = 23, 20+3=23, 23=23 True.
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Less becuase their is no extra room to store it
X = 2 + 4y 67 = x + y 67 = (2 + 4y) + y = 2 + 5y 65/5 = 13 = y 67 - 13 = x = 54. x = 54 y = 13.
I think it's B with the bar on top
That would be 1.785 x 10^-4