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Elena L [17]
3 years ago
12

What is the standard form

Mathematics
1 answer:
alexdok [17]3 years ago
7 0

Answer:

C.  7/4 + √3i / 4.

Step-by-step explanation:

(1 + 2√-3) / (1 + √-3)

Since √-1 = i we have:

(1 + 2√3i) / (1 + √3i)

Multiply top and bottom by the conjugate (1 - √3i):

(1 + 2√3i)( (1 - √3i) /  (1 + √3i) (1 - √3i)

= 1 - √3 i + 2√3 i + 6) ( 1 + 3)

= 7  +√3i /  4

= 7/4 + √3i / 4.

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The plane that contains points C and T can also be named plane...
Mnenie [13.5K]

Answer:

  A)  CUB

Step-by-step explanation:

Of the suggested planes, only CUB contains both points C and T.

___

<em>Comments on the other answer choices</em>

BED contains point T, but not C

ACE contains point C, but not T

ABE contains neither C nor T

6 0
3 years ago
One-fifth of the sum of 7 and C<br> Translate algebraic expression
Dmitry_Shevchenko [17]

Answer:

\frac{1}{5} C +\frac{7}{5}

Step-by-step explanation:

\frac{1}{5} (7+C)

\frac{7}{5} +\frac{1}{5} C

8 0
4 years ago
Jina received a $70 gift card for a coffee store. She used it in buying some coffee that cost $7.51 per pound. After buying the
dem82 [27]

Answer: 3 pounds

Step-by-step explanation:

The equation can be set up according to slope form: y=mx+b where x represents cost per round.

$70 = $7.51x + $47.47

Subtract 47.47 to both sides: $22.53 = $7.51x

Divide both sides by 7.51: 3 = x

4 0
3 years ago
Read 2 more answers
Would anyone be willing to helppp? I’ll be giving brainliest when I get the chance too
anyanavicka [17]

Step-by-step explanation:

1. add the numbers all together

(of the pets)

= 40 pets total

40 pets =100%

1 pet = 2.5%

percents:

Cat= 10, or 25%

Dog = 15, or 37.5 %

fish=8 or 20%

bird= 7 or 17.5%

angles:

dog= 135

cat= 90

fish= 72

bird= 63

5 0
3 years ago
Find all solutions in radian [0,2pi) solve 4sinx= -cos^2x +4
Sphinxa [80]
I hope this helps you


-cos²x= sin²x-1


4.sinx = sin²x-1+4


sin²x-4.sinx +3=0


(sinx-3)(sinx-1)=0


sinx≠3


sinx =1


SİN90=1


8 0
3 years ago
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