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Kamila [148]
3 years ago
7

Evaluate expression when a=6 a2-6a+4

Mathematics
2 answers:
olga55 [171]3 years ago
8 0
Hi again :)

a = 6

a² - 6a + 4

All you have to do is to replace 6 where you see the a

(6)²  - 6(6) + 4

36 - 36 + 4

= 4

Yep, that easy!

I hope this helps! Let me know if you have any questions :)
Mekhanik [1.2K]3 years ago
7 0
The first step to solving this problem is to plug in 6 where you see a in the expression
-6² - 6 (-6) + 4
the first step to solving this is to evaluate the power
-36 - 6x (-6) + 4
next you will multiply the numbers
-36 + 36 + 4
finally,, eliminate the opposite of the expression to find your answer
4
this means that the correct answer to your question is 4.
let me know if you have any further questions
:)
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Kitty [74]

Answer:

128

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask!!!

3 0
3 years ago
25 (a square) - 4 (b square) + 28bc - 49 (c square)
LUCKY_DIMON [66]

Answer:

(5a - [2b - 7c]) and (5a + [2b + 7c])

Step-by-step explanation:

Factor 25a^2 - 4b^2 + 28bc - 49c^2.

Note that - 4b^2 + 28bc - 49c^2 involves the variables b and c, whereas 25a^2 has only one variable.  Thus, try to rewrite - 4b^2 + 28bc - 49c^2 as the square of a binomial:

- 4b^2 + 28bc - 49c^2 = -(4b^2 - 28bc + 49c^2), or

                                        -(2b - 7c)^2.

Thus, the original  25a^2 - 4b^2 + 28bc - 49c^2  looks like:

                               [5a]^2 - [2b - 7c]^2

Recall that a^2 - b^2 is a special product, the product of (a + b) and (a - b).  Applying this pattern to the problem at hand, we conclude:

Thus,   [5a]^2 - [2b - 7c]^2 has the factors (5a - [2b - 7c]) and (5a + [2b + 7c])

8 0
3 years ago
The volume of a sphere whose diameter is 18 centimeters is how many cubic centiemters
Arturiano [62]

Answer:

3053.63 cm^3

Step-by-step explanation:

Volumme of a sphere =  \frac{4}{3}\pi*r^3.

We do not have the radius of the sphere, but we have its diameter.

We know that there is a relationship between radius and diameter.

d = 2r\\r = \frac{d}{2}

Then the formula of the volume of a sphere according to its diameter is:

\frac{4}{3}\pi (\frac{d}{2}) ^ 3\\\\\frac{4}{3}\pi(9)^3 = 972\pi = 3053.63 cm^3\\\\

3 0
3 years ago
5,890,000=a×10b a==?<br>​
guapka [62]

Answer:

=146628

Step-by-step explanation:

gracias por los puntos

8 0
3 years ago
A soccer team played 32 games.If they won 25% of them, how many games did the team win
Molodets [167]

Answer:

8

Step-by-step explanation:

They only won 25%

25%=1/4

32/4=8

They won 8 games

3 0
3 years ago
Read 2 more answers
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