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prohojiy [21]
3 years ago
7

Which expression represents the area of the rectangle (2x+7)(4x+5)?

Mathematics
1 answer:
zhenek [66]3 years ago
3 0

So we'll do FOIL (first, outer, inner, last)

The equation is (4x+5)(2x+7)

First, 4x·2x=8x²

Outer, 4x·7=28x

Inner, 5·2x=10x

Last, 5·7=35

Add like terms and you get:

8x²+38x+35

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Simplify. (2/5)^4... words to fill in minimum space
Stella [2.4K]
When you have a power to a fraction, you simply take it by the top and then by the bottm.

So, split it into two: (2)^4 and (5)^4

Solve: (2)^4=16
(5)^4=625

So the fraction is: 16/625

Check to see if it reduces: It doesn't. (Odd and even numbers that have no common multiples).

Therefore, that's the answer.
3 0
3 years ago
What Is the answer for 11/12+6/10?
kirill115 [55]

Answer:

91/60

1.516

1 31/60

Step-by-step explanation:

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3 years ago
Estimate the isoelectric point of a ser–his dipeptide. explain why this value is only an estimate.
uranmaximum [27]
A dipeptide bond connects two amino acids. Ser stands for Serine while His stands for Histidine. Isoelectric point is when all charges of the two amino acids cancel out. This can be estimated by finding the average of the isoelectric points (pI) of the two amino acids.

Serine: pI = 5.68
Histidine: pI = 7.59

Average pI = (5.68 + 7.59)/2 =<em> 6.635

</em>
<em />This is only a rough estimate because an arithmetic average will not coincide with the biochemistry of the amino acids. The true value of the isolectric point is determined through experimentation. However, it would be more ore less around 6.635.<em>
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3 0
3 years ago
Please help me idk this
GarryVolchara [31]

Answer:

<h2>h = 18 cm</h2>

Step-by-step explanation:

A=\dfrac{bh}{2}\\\\A=117\ cm^2\\b=13\ cm

Substitute:

117=\dfrac{13h}{2}               <em>multiply both sides by 2</em>

234=13h            <em>divide both sides by 13</em>

18=h\to h=18\ cm

6 0
3 years ago
Cos60° = x divided by 16
777dan777 [17]
  • Answer:

<em>x = 8</em>

  • Step-by-step explanation:

<em>cos60° = x/16</em>

<em>1/2 = x/16</em>

<em>2x = 16</em>

<em>x = 16 : 2</em>

<em>x = 8</em>

6 0
3 years ago
Read 2 more answers
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