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egoroff_w [7]
3 years ago
11

49x^2 -7=93 Show me step by step please?

Mathematics
1 answer:
Galina-37 [17]3 years ago
5 0

Answer:

<u>Exact form:</u> 10/7 , 10/7

<u>Mixed number form:</u> 1 3/7, -1 3/7

Step-by-step explanation:

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Find [4(cos15° + isin15°)]^3 and express it in a + bi form.
AleksandrR [38]

Answer:

see explanation

Step-by-step explanation:

Using De Moivre's theorem

Given

[ 4(cos15° + isin15° ) ]³, then

= 4³ [ cos(3 × 15°) + isin(3 × 15°) ]

= 64 (cos45° + isin45° )

= 64 (\frac{\sqrt{2} }{2} + \frac{\sqrt{2} }{2} i )

= 64 (\frac{\sqrt{2} }{2} (1 + i) )

= 32\sqrt{2} (1 + i)

= 32\sqrt{2} + 32\sqrt{2} i

5 0
3 years ago
3x+30+x=10+2x+5x+2 <br> i need help fast
kupik [55]

Answer:

x=6

Step-by-step explanation:

Group Like Terms:

3x+x+30=10+2x+5x+2

Add similar elements 3x+x=4x:

4x+30=10+2x+5x+2

Add similar elements 2x+5x=7x:

4x+30=10+7x+2

Group like terms:

4x+30=7x+10+2

Add the numbers 10+2=12:

4x+30=7x+12

Subtract 30 from both sides:

4x+30-30=7x+12-30

Simplify:

4x=7x-18

Subtract 7x from both sides:

4x-7x=7x-18-7x

Simplify:

-3x=-18

Divide both sides by -3:

\frac{-3x}{-3} =\frac{-18}{-3}

Simplify:

x=6

Hence, the correct answer is 6

4 0
2 years ago
Umar has 5 dimes in his right pocket and three dimes in his left pocket how much money does Omar have? What is the hidden questi
lukranit [14]

Answer:

he has 80 cents

Step-by-step explanation:

dime=10 cents

7 0
3 years ago
Read 2 more answers
The area of a circle, in terms of π, is 196π m2.<br> Find the value of the radius.
AleksandrR [38]

Step-by-step explanation:

if area of circle = pi times radius^2,

area of circle divided by pi = radius^2

so, square root (area of circle divided by 2) = radius.

so, 196pi = m2

approx 616

616=m2

sqrt 616 =m

approx value of radius is 25 or 24.8

pls mark this as brainliestttt

5 0
2 years ago
Three of these expressions give the distance between points A and B on the number line. Which expression does NOT?
NARA [144]

answer: was willing to help but you should’ve added a picture or added the choices there was to pick from because there isn’t much info.

7 0
3 years ago
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