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3 years ago

WHOEVER CAN SOLVE THIS GETS 20 POINTS! Am I correct? And if so, can you explain why?

Mathematics

2 answers:

KIM [24]3 years ago

6 0

Your answers are correct

igomit [66]3 years ago

3 0

Hello from MrBillDoesMath!

Answer:

#11. Your choice, 3x + 1 <= 4, is correct

#13 Your choice, 8p +5 > 21. is correct

Discussion:

#11, Let's explore: 3x + 1 <= 4

3x + 1 <= 4 =>

3x + 1 -1 <= 4 - 1 => (subtract 1 from both sides)

3x <= 3 =>

x <=1

which matches the red line segment shown. In the diagram, the point x = 1 is included (a solid dot) as in our solution x <=1.

#13. The second radio button, the one you selected, is correct. Let's explore:

8p + 5 > 21 =>

8p + 5 -5 > 21 - 5 (subtract 5 from both sides)

8p > 16 (as 21-5 = 16)

p > 2 (divide both sides by 8)

Note that this solution, like the graph ("open circle" at 2) does NOT include the point p = 2

Regards,

MrB

P.S. I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!

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