jessiegonzales
  • jessiegonzales
MEDAL!! ALGEBRA 2 19. l-4b-8l+l-1-b^2l +2b^3;b=2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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butterflydreamer
  • butterflydreamer
\[\left| -4(2) - 8 \right| + \left| -1-(2)^2 \right| + 2(2)^3 \]
butterflydreamer
  • butterflydreamer
You are basically solving the above ^ Since they've told you that " b = 2" , this means that you just sub (plug) in 2 where the "b" is. Basically REPLACE all the "b's" with 2 and solve :) BUT you want to take note of the absolute value sign also...
butterflydreamer
  • butterflydreamer
So firstly, let's simplify the parts inside the first absolute sign " -4(2) - 8 " What does -4(2) - 8 = ?

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More answers

jessiegonzales
  • jessiegonzales
-8 - 8
jessiegonzales
  • jessiegonzales
-16?
butterflydreamer
  • butterflydreamer
yes :) Now can you see how that part was BETWEEN the absolute value sign? Absolute value means you always take the POSITIVE of that value inside. So \[\left| -4(2) - 8 \right| = \left| -8-8 \right|= \left| -16 \right| = 16 \]
butterflydreamer
  • butterflydreamer
\[\left| -1-(2)^2 \right| = ? \]
jessiegonzales
  • jessiegonzales
-5
butterflydreamer
  • butterflydreamer
remember, you take the "absolute value" of -5... So \[\left| -1-(2)^2 \right| = \left| -5 \right| = 5 \] And now solve the last part: \[2(2)^3 = ? \]
jessiegonzales
  • jessiegonzales
32
jessiegonzales
  • jessiegonzales
i mean 24
butterflydreamer
  • butterflydreamer
not quite. What does \[2^3 = ? \]
jessiegonzales
  • jessiegonzales
16
butterflydreamer
  • butterflydreamer
err nope.. \[2^3 = 2\times2\times2 = ? \]
jessiegonzales
  • jessiegonzales
8
butterflydreamer
  • butterflydreamer
yes and we wanted: \[2(2)^3 = 2\times2\times2\times2 = ?\]
jessiegonzales
  • jessiegonzales
2(16)
butterflydreamer
  • butterflydreamer
2(2)^3 = 2 times 2 times 2 times 2 = 16
jessiegonzales
  • jessiegonzales
2^3=8
butterflydreamer
  • butterflydreamer
So now we solved the three parts of this equation : \[\left| -4(2) -8 \right| + \left| -1-(2)^2 \right| + 2(2)^3 \] \[= 16 + 5 + 16 = ? \]
jessiegonzales
  • jessiegonzales
37
butterflydreamer
  • butterflydreamer
correcttt
jessiegonzales
  • jessiegonzales
final answer is 37??
butterflydreamer
  • butterflydreamer
yes
jessiegonzales
  • jessiegonzales
thankyou zoo much
butterflydreamer
  • butterflydreamer
you're welcome :)

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