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Xelga [282]
3 years ago
11

Solve this please...

Mathematics
2 answers:
Airida [17]3 years ago
6 0

Answer:

a.)

Step-by-step explanation:

(\sqrt{12}+6)(-\sqrt{8}-\sqrt{2})

Find the simplest radical form for \sqrt{12}:

Find two numbers that multiply to 12, one of which is a perfect square:

\sqrt{12}=\sqrt{3*4}

Separate:

\sqrt{3}\sqrt{4}

Simplify by finding the square root:

\sqrt{3}*2=2\sqrt{3}

Insert the simplified version:

(2\sqrt{3}+6)(-\sqrt{8}-\sqrt{2})

Find the simplest radical form of \sqrt{8}:

Find two numbers that multiply to 8, one of which is a perfect square:

\sqrt{8}=\sqrt{4*2}

Separate:

\sqrt{4} \sqrt{2}

Simplify by finding the square root:

2\sqrt{2}

Insert the simplified version:

(2\sqrt{3}+6)(- 2\sqrt{2}-\sqrt{2})

Sorry this is taking forever to type, here

kap26 [50]3 years ago
5 0
The top one, hope this is right :)
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Answer:

Ben needs to get a 99% on his second test

Step-by-step explanation:

The average is the sum of both test scores, divided by the total number of test scores (2).

Let x by the grade Ben must receive on his second test.

(89 + x)/2 = 94

Multiply by 2 on both sides

89 + x = 188

Subtract 89 on both sides

x = 99

Check work:

(89 + 99)/2 = 188/2 = 99

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3 years ago
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PLS HELP ME ASAP WITH NUMBER 9 THANK YOUU
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9a)
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4x + 28 = 68
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molly shot 20 baskets in 4 minutes Nico shot 42 baskets in 6 minuets how many more baskets did nico shoot per minuete did
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Tiffany wants to calculate the volume of her globe. The globe is in the shape of a sphere. She measured the circumference of the
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Answer:

<h2>231in^3</h2>

Step-by-step explanation:

We know that the volume of a sphere/globe is given as

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but the circumference is expressed as

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solving for r given  that C=24

24=2*3.142r

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V=4 /3π(3.8)^3

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3 0
3 years ago
Evaluate the function f(x)=x^2+6x+2 at the given values of the independent variable and simplify.
____ [38]

Answer:

a) 18

b)x^2+10x+18

c)x^2 -6x+2

Step-by-step explanation:

This is a case of plugging in the value into f(x).

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f(-8)= 64 + (-48) +2

f(-8)=64 + (-46)

f(-8)=18

b)  f(x+2)= (x+2)^2+6(x+2)+2

So here I'll take a break to explain what's going on, because x+2 is a binomial meaning two terms and it is being squared I have to multiply the whole thing by itself. Meaning: (x+2) x (x+2), this is also known as foiling!! and for the next part its distributing 6 into x and 2.

    f(x+2)= x^2+4x+4+6x+12+2

I'll reorder it

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c) f(-x)= -x^2+6(-x) +2

f(-x)= x^2 -6x+2

6 0
3 years ago
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