2 years ago

Solve by completing the square, please help

Mathematics

1 answer:

Talja [164]2 years ago

6 0

Answer:

x = 4 + √ 38

Step-by-step explanation:

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How many hours and minutes elapsed from 8:00 a.m to 2:30 p.m?

seraphim [82]

Answer:

6 hours and 30 mins

Step-by-step explanation:

This is right answer because from 8:00 to 9:00 is 1 hour and each hour is 60 mins and each minute is 60 secs. I hope this helps and please give me the crown

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3 years ago

The arc of the parabola y = x^2 from (3,9) to (4,16) is rotated about the y-axis. Find the area of the resulting surface. Please

Hitman42 [59]

Answer:

156.5

Step-by-step explanation:

Thinking process:

The area can be calculated using the formula:

$S = \int\limits^4_3 {2\pi x\sqrt{1+}(2x)^{2} } \, dx$

We let the substitution take place.

Therefore, we let $u = 1 + 4x^{2}$

Thus, $du = 8dx.$

So,

$xdx = \frac{1}{8}du$

Also, the interval of the integration changes to [ 37, 65]

Thus,

$S = \int\limits^4_3 {2\pi \sqrt{1+4x^{2} } } \, dx \\= \int\limits^65_35 {2\pi \sqrt{\frac{1}{8}u } } \, dx$

= $\frac{1}{6} [ 65^{\frac{3}{2}-37^{\frac{3}{2} } }$

= 156.5 units²

8 0

3 years ago

Solve for x. 8 x = 32

Kryger [21]

Answer:

x = 4

Step-by-step explanation:

8x = 32

x = 4

6 0

3 years ago

Read 2 more answers

Whats this problem i need help

Eva8 [605]

Answer:

perimeter of triangle=sum of all sides

perimeter of triangle = 3/10ft + 3/10ft + 1/10ft

perimeter of triangle =7/10ft

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2 years ago

How to solve these numbers I forgot

Anastasy [175]

40 because 3+6+12 = 21 and 8+11+21 =40

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4 years ago

Solve by completing the square, please help​

Solve by completing the square, please help