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Mariulka [41]
3 years ago
13

Find the surface area and volume of a cube with sides of 5.5 cm each.

Mathematics
1 answer:
djyliett [7]3 years ago
6 0

Answer:

Area: 181.5

Volume: 166.4

Step-by-step explanation:

Hope this helps.

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2. Andrew made an error in determining the polynomial equation of smallest degree whose roots are 3, 2+2i and 2-2i.
inna [77]

The polynomial equation for the given roots is x³-7x²+20x-24=0.

Given that, the polynomial equation of the smallest degree whose roots are 3, 2+2i and 2-2i.

Now, we need to write the polynomial equation.

<h3>What is a polynomial equation? </h3>

A polynomial equation is an equation where a polynomial is set equal to zero. i.e., it is an equation formed with variables, non-negative integer exponents, and coefficients together with operations and an equal sign. It has different exponents. The highest one gives the degree of the equation. For an equation to be a polynomial equation, the variable in it should have only non-negative integer exponents. i.e., the exponents of variables should be only non-negative and they should neither be negative nor be fractions.

Now, x=3, x=2+2i and x=2-2i

x-3, x-2-2i and x-2+2i

So, the polynomial equation is (x-3)(x-2-2i)(x-2+2i)=0

⇒(x-3)(x(x-2-2i)-2(x-2-2i)+2i(x-2-2i))=0

⇒(x-3)(x²-2x-2xi-2x+4+4i+2xi-4i-4i²)=0

⇒(x-3)(x²-2x-2x+4-4i²)=0

⇒(x-3)(x²-4x+4+4)=0 (∵i²=-1)

⇒(x-3)(x²-4x+8)=0

⇒x(x²-4x+8)-3(x²-4x+8)=0

⇒x³-4x²+8x-3x²+12x-24=0

⇒x³-7x²+20x-24=0

Therefore, the polynomial equation for the given roots is x³-7x²+20x-24=0.

To learn more about the polynomial equation visit:

brainly.com/question/20630027.

#SPJ1

3 0
2 years ago
The Smith Family made an $800 down payment and pays $75 per month for new furniture. At the same time the Cooper family made a $
spin [16.1K]
75m + 800 = 95m + 500
Solve that equation
Which should get you m=15
15 is your answer
4 0
3 years ago
The cost for a pack of 9 padlock is $25.20 find the unit price in dollars per padlock if necessary round your answer to the near
Elena-2011 [213]

Answer:

2.80

Step-by-step explanation:

Take the cost and divide by the number of padlocks

25.20/9

2.80

Each padlock costs 2.80

8 0
3 years ago
Read 2 more answers
What is the geometric mean of 2 and 8?
asambeis [7]

Answer:

The geometric mean of 2 and 8 comes out to equal 4.

Step-by-step explanation:


4 0
3 years ago
QUICK! Giving brainliest to correct answer
garri49 [273]

Answer:

Dominos is the better deal.

4 0
3 years ago
Read 2 more answers
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