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pishuonlain [190]
3 years ago
9

Find the product. (-2x^2)^3 * 3x

Mathematics
2 answers:
Lelechka [254]3 years ago
7 0

Answer:

-24\cdot x^{7}

Step-by-step explanation:

We have been given an expression (-2x^2)^3\cdot3x. We are asked to find the product of our given expression.

Using exponent property (a^b)^c=a^{b\cdot c}, we will get:

(-2x^2)^3\cdot 3x=-2^3\cdot x^{2\cdot 3}\cdot3x

(-2x^2)^3\cdot 3x=-8\cdot x^{6}\cdot 3x

(-2x^2)^3\cdot 3x=-8\cdot 3\cdot x^{6}\cdot x

(-2x^2)^3\cdot 3x=-24\cdot x^{6}\cdot x

Using exponent property a^b\cdot a^c=a^{b+c}, we will get:

(-2x^2)^3\cdot 3x=-24\cdot x^{6+1}

(-2x^2)^3\cdot 3x=-24\cdot x^{7}

Therefore, the product of our given expression would be -24\cdot x^{7}.

oee [108]3 years ago
3 0
I hope this helps you

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Help I will be marking brainliest!!!
Keith_Richards [23]
<h3>Answer:  A.  18*sqrt(3)</h3>

=============================================

Explanation:

We'll need the tangent rule

tan(angle) = opposite/adjacent

tan(R) = TH/HR

tan(30) = TH/54

sqrt(3)/3 = TH/54 ... use the unit circle

54*sqrt(3)/3 = TH .... multiply both sides by 54

(54/3)*sqrt(3) = TH

18*sqrt(3) = TH

TH = 18*sqrt(3) which points to <u>choice A</u> as the final answer

----------------------

An alternative method:

Triangle THR is a 30-60-90 triangle.

Let x be the measure of side TH. This side is opposite the smallest angle R = 30, so we consider this the short leg.

The hypotenuse is twice as long as x, so TR = 2x. This only applies to 30-60-90 triangles.

Now use the pythagorean theorem

a^2 + b^2 = c^2

(TH)^2 + (HR)^2 = (TR)^2

(x)^2 + (54)^2 = (2x)^2

x^2 + 2916 = 4x^2

2916 = 4x^2 - x^2

3x^2 = 2916

x^2 = 2916/3

x^2 = 972

x = sqrt(972)

x = sqrt(324*3)

x = sqrt(324)*sqrt(3)

x = 18*sqrt(3) which is the length of TH.

A slightly similar idea is to use the fact that if y is the long leg and x is the short leg, then y = x*sqrt(3). Plug in y = 54 and isolate x and you should get x = 18*sqrt(3). Again, this trick only works for 30-60-90 triangles.

4 0
2 years ago
If x = 3 and y = -1, then 3x2 + 2xy - 5 = ? <br> A: 18 <br> B: 24 <br> C: 12 <br> D: 16
iris [78.8K]
x = 3 , \ y = -1 \\ \\ 3x^2 + 2xy - 5 = 3\cdot 3^2 + 2\cdot 3\cdot (-1)-5=\\ \\=3\cdot 9 -6-5=27-11=16 \\ \\ Answer : \ D: \ \ 16


8 0
3 years ago
Read 2 more answers
Bethany has 3.10$ in nickels and dimes. She has a total of 44 coins . What is the value of the nickels Bethany has
vlada-n [284]
Represent the unknows with n and d.

Then n+d = 44 (# of coins)

and 

$0.05n + $0.10d = $3.10   (value of coins)

Solving the first equation for n, we get n = 44-d.  Subst.  44-d for n in the 2nd equation:

0.05(44-d) + 0.10d = 3.10
Then 2.20 - 0.05d + 0.10d = 3.10, or
          2.20 + 0.05d             = 3.10, or    0.05d = 0.90.  Solving for d, 
       0.90
d = -------- = 18
        0.05

There are 18 dimes and 44-18 nickels.  How many nickels is that?  ;)

5 0
3 years ago
Read 2 more answers
The polynomial given below has _____ root(s).2x2 + 5x + 2
Nastasia [14]
2x^2 + 5x + 2 = 0
(x + 2)(2x + 1) = 0
x = -2 x = - 1/2
Letter C
8 0
3 years ago
How do you solve y= -3+3​
Ilia_Sergeevich [38]
Answer=

y=-3+3
y=0

the sum of -3+3 is zero.
6 0
3 years ago
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