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Andrej [43]
3 years ago
13

Find the area of a square if the length of the side is 12.

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

Answer:

144

Step-by-step explanation:

Because when you find the area of a square, the sides of a square is the same, you just multiply 12 and 12, because area is just 2 sides of the shape! Your welcome :D  

Novosadov [1.4K]3 years ago
4 0

Answer:

12*12=144

Step-by-step explanation:

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10 points, thanks for the help :)
Margaret [11]

Answer:

Step-by-step explanation:

Factoring an expression is the process of undoing the multiplication.

Assume you have a function f(x):

f(x)=x^2+2x-48

This can be factored:

f(x)=(x+8)(x-6)

Using multiplication and the distributive property, you arrive back to:

f(x)=x^2+2x-48

Then you can see clearly that all we've done is reverse the multiplication.

7 0
3 years ago
Mario bought a new video game for $68.99. how much did he have to pay, including 13% tax
Butoxors [25]

Mario had to pay $73.43 for the new video game

4 0
3 years ago
Read 2 more answers
The cake store is having a 25%, percent off sale on all of its cakes. If the cake you want regularly costs $9 dollar , how much
Irina-Kira [14]
2.25 is how much you would save

7 0
3 years ago
Read 2 more answers
4th term of (4x-y)^9
Neko [114]
Now, let's do the same as we did for the previous one here.

\bf (4x-y)^9\implies 
\begin{array}{llll}
term&coefficient&value\\
-----&-----&-----\\
1&+1&(4x)^9(-y)^0\\
2&+9&(4x)^8(-y)^1\\
3&+36&(4x)^7(-y)^2\\
4&+84&(4x)^6(-y)^3
\end{array}

notice again, how did we get 84 for the 4th element's coefficient? well 36 * 7 / 3.  and so on.  And you can just expand it from there.
3 0
3 years ago
Find constants a and b such that the function y = a sin(x) + b cos(x) satisfies the differential equation y'' + y' − 7y = sin(x)
Elza [17]
The first thing we must do in this case is find the derivatives:
 y = a sin (x) + b cos (x)
 y '= a cos (x) - b sin (x)
 y '' = -a sin (x) - b cos (x)
 Substituting the values:
 (-a sin (x) - b cos (x)) + (a cos (x) - b sin (x)) - 7 (a sin (x) + b cos (x)) = sin (x)
 We rewrite:
 (-a sin (x) - b cos (x)) + (a cos (x) - b sin (x)) - 7 (a sin (x) + b cos (x)) = sin (x)
 sin (x) * (- a-b-7a) + cos (x) * (- b + a-7b) = sin (x)
 sin (x) * (- b-8a) + cos (x) * (a-8b) = sin (x)
 From here we get the system:
 -b-8a = 1
 a-8b = 0
 Whose solution is:
 a = -8 / 65
 b = -1 / 65
 Answer:
 
constants a and b are:
 
a = -8 / 65
 
b = -1 / 65
4 0
3 years ago
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