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ANTONII [103]
3 years ago
11

How do you evaluate this expression|-4b-8|+|1-b^2|+2b^3;b=2

Mathematics
2 answers:
lesantik [10]3 years ago
6 0

for an absolute value expression, once you remove the bars, anything inside comes out as positive.


\bf |-4b-8|+|1-b^2|+2b^3\implies \stackrel{b=2}{|-4(2)-8|~~+~~|1-(2)^2|~~+~~2(2)^3}
\\\\\\
|-8-8|~~+~~|1-4|~~+~~2(8)\implies |-16|~~+~~|-3|~~+~~16
\\\\\\
16~~+~~3~~+~~16\implies \blacktriangleright 35 \blacktriangleleft

Natasha2012 [34]3 years ago
3 0

Answer: -11

Step-by-step explanation:

|-4b-8| + |-1-b^2| + 2b^3; b = -2

|-4(-2)-8| + |-1-(-2)^2| + 2(-2)^3

= |8-8| + |-1-4| + 2(-8)

= 0 + 5 - 16

= -11

or

|-4b-8| + |-1-b^2| + 2b^3 ; b=-2

=| -4( -2)-8| + | -1-(-2)^2| + 2(-2)^3

=| 8 - 8| + | -1 - 4| + 2(-8)

= | 0 | + |-5| - 16

=0 + 5 - 16

= - 11

Either way your answer is still -11.

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tatiyna

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2. -16

6. 23

7. -40

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6 0
2 years ago
Rita is the manager of the football team, and she has been assigned the task of painting a mascot in the middle of the field. Th
Alik [6]

Answer:

25 square yards

Step-by-step explanation:

We assume that "fits neatly" means "fills" so that the area of the painting is the same as the area of the square. Put the numbers in the formula and do the arithmetic.

A = (5 yd)² = 5² yd² = 25 yd²

4 0
3 years ago
Area = 120 units squared <br> Base = 8 units <br> Length = ? (Include the units in your answer)
Vesnalui [34]

Answer:

15

Step-by-step explanation:

Okay, so we know that Base*Length=Area, so we just have to divide the area by the base, so the formula here is Area/Base=Length.

That would get us 120/8=Length,

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4 0
2 years ago
In ΔLMN, n = 510 cm, l = 820 cm and ∠M=20°. Find ∠L, to the nearest degree
Dafna11 [192]

The angular measure L is : 47°

<h3>What are angles?</h3>

Angles are formed when two lines meet.

Analysis:

Firstly, we calculate for m using cosine rule.

m^{2} = 510^{2} + 820^{2} -2(510)(820) cos 20

m^{2} = 260100 + 672400 -83600(0.9396)

m^{2} = 146618.56

m = \sqrt{146618.56} = 382.9cm

using sine rule to find ∠L

382.9/sin20 = 820/sinL

sinL = 820sin20/382.9

sinL = 820(0.342)/382.9

sinL = 0.732

L = sin inverse of 0.732 = 47°

In conclusion, ∠L is 47°

Learn more about sine and cosine rule: brainly.com/question/4372174

#SPJ1

8 0
2 years ago
Use mental math to figure out
never [62]
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3) 290
4) 682
5) 45
6) 925
7) 416
3 0
3 years ago
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