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3 years ago

20 POINTS AND BRANILEST ANSWER ALL PARTS

Mathematics

1 answer:

satela [25.4K]3 years ago

5 0

Answer:

your answer would be 4.19

Step-by-step explanation:

radius is half the amount of the diameter so you simply just divide the diameter by 2, so get your radius.

here's the formula.

V= $\frac{4}{3}$ π r³

What do I wonder about this photo?

Is he single? LOL no not the guy, the snowman!

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Which equation has x = -i and x = = 21v3 as two of its solutions?

Drupady [299]

Answer:

The equation in option A is correct.

Step-by-step explanation:

Given the equation

$\:y=x^4+13x^2+12$

Let us find the solution by setting y=0

$x^4+13x^2+12=0\:\:\:\:\:$

$\mathrm{Rewrite\:the\:equation\:with\:}u=x^2\mathrm{\:and\:}u^2=x^4$

$u^2+13u+12=0$

if $ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)$

$u+1=0\quad \mathrm{or}\quad \:u+12=0$

$u=-1,\:u=-12$

$\mathrm{Substitute\:back}\:u=x^2,\:\mathrm{solve\:for}\:x$

$x^2=-1,\:x^2=-12$

solving

$x^2=-1$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{-1},\:x=-\sqrt{-1}$

$x=i,\:x=-i$ ∵ $\:\sqrt{-1}=i$

solving

$x^2=-12$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{-12},\:x=-\sqrt{-12}$

$x=2\sqrt{3}i,\:x=-2\sqrt{3}i$

Hence, the solutions are:

$x=i,\:x=-i,\:x=2\sqrt{3}i,\:x=-2\sqrt{3}i$

Therefore, the equation in option A is correct.

6 0

3 years ago

Starting at home, Ishaan traveled uphill to the gift store for 18 minutes at just 10 mph. He then traveled back home along the s

snow_lady [41]

The distance to the store is
.. (0.3 h)*(10 mi/h) = 3 mi

The time home is
.. (3 mi)/(30 mi/h) = 0.1 h

The average speed is the total distance divided by the total time
.. speed = (3 mi +3 mi)/(0.3 h +0.1 h) = (6 mi)/(0.4 h) = 15 mi/h

Ishaan's average speed was 15 mi/h.

7 0

3 years ago

9y - 2= 5(2y + 4) UGHHHHHH!

hammer [34]

Answer:

y = -22

Step-by-step explanation:

9y - 2= 5(2y + 4)

9y - 2 = 10y + 20

-22 = y

3 0

4 years ago

Read 2 more answers

choose a number between 67 and 113 that is a multiple of 4, 8, and 16 . Write all the numbers that she could choose. If there is

Allushta [10]

2 is a multiple of 4, so anything that's a multiple of 4 will automatically be a multiple of 2 so 3 x 4 = 12 so multiples of 12 that are between 67 and 113 are...? 12 x 6 = 72 12 x 7 = 84 12 x 8 = 96 12 x 9 = 108 <span> 72 or 84 or96 or 108 all are divisible by 2,3 and 4 all fall between 67 and 112</span>

6 0

4 years ago

The measure of angle θ 7pi/6 is . The measure of its reference angle is °, and sin θ is

Vikki [24]

<span>The reference angle is closest to the x-axis.
I will assume the above is 7pi/6. That would be a reference angle of pi/6, and the sin in the 3rd quadrant is negative, so the sin theta = - 0.5</span>

6 0

3 years ago

Read 2 more answers