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sashaice [31]
3 years ago
5

What is the value of the expression? ( 5/2 ) ^2 +3/4 ^3

Mathematics
1 answer:
NeX [460]3 years ago
7 0

5/2 ^2 =  6 1/4 = 6.25

3/4^3 =  27/64 = 0.4201875

6 1/4 + 27/64 = 6 43/64  (mixed number)

6.25 +0.421875 = 6.671875 (decimal)


 not sure what format you need, since the question was in fraction form, I think you need to answer using a mixed number though.


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2 years ago
20×^2-30x-40 solve for x
Oduvanchick [21]

Answer:

x = 12

Step-by-step explanation:

Solve for x:

360 - 30 x = 0

Subtract 360 from both sides:

(360 - 360) - 30 x = -360

360 - 360 = 0:

-30 x = -360

Divide both sides of -30 x = -360 by -30:

(-30 x)/(-30) = (-360)/(-30)

(-30)/(-30) = 1:

x = (-360)/(-30)

The gcd of 360 and -30 is 30, so (-360)/(-30) = (-(30×12))/(30 (-1)) = 30/30×(-12)/(-1) = (-12)/(-1):

x = (-12)/(-1)

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Answer:  x = 12

4 0
3 years ago
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Lina20 [59]
This question makes no sense
7 0
3 years ago
8 out of every 14 children in a school are boys. What is the ratio of boys to girls in the school?
DochEvi [55]

Answer:

8:6

Step-by-step explanation:

If 8 out of 14 students are boys then the remaining number of students must be girls

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There are 6 girls out of the 14

So as a ratio of boys to girls

8:6

7 0
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Answer:

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Step-by-step explanation:

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