20 is the answer to this question
Answer:
b.) x = -8
Step-by-step explanation:
Solve -4*(2x + 3) = 2x + 6 - (8x + 2)
-8x + -12 = 2x + 6 - 8x - 2
-8x - 12 = -6x + 4
-12 = 8x - 6x + 4
-12 = 2x + 4
-12 - 4 = 2x
-16 = 2x
x = -8
For a number to be a solution to an equation, it has to satisfy the equation...it has to make the equation true.
for example :
2n + 6 = 10.....n is our unknown number
2n = 10 - 6
2n = 4
n = 4/2
n = 2...so the number that makes the equation true is 2
and to check if the number is a solution, we then sub that number back into the original equation to see if it makes the equation true.
2n + 6 = 10
2(2) + 6 = 10
4 + 6 = 10
10 = 10 (correct)
so our number (n) represents the number 2, and it does make the equation true
Option D:
The dimensions of the matrices don't align properly to find their sum.
Solution:
Given data:
![\left[\begin{array}{c}3 \\-2\end{array}\right]+\left[\begin{array}{cc}5 & -3 \\1 & 4\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D3%20%5C%5C-2%5Cend%7Barray%7D%5Cright%5D%2B%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D5%20%26%20-3%20%5C%5C1%20%26%204%5Cend%7Barray%7D%5Cright%5D)
Dimension of matrix = Number of rows × Number of columns
Dimension of matrix
is 2 × 1
Dimension of matrix
is 2 × 2
Here, we have to add the two matrices.
<em>The dimension of the matrices must be same to add or subtract matrices.</em>
Here the dimensions are 2 × 1 and 2 × 2.
The dimensions are not same.
Hence we can't find their sum.
Option D is the correct answer.
The dimensions of the matrices don't align properly to find their sum.
Here you go!! It would be, 6-3+52!