Answer:
-9
Step-by-step explanation:
You have to plug 8 into the formula for x. f(8) = -2(8)+7 = -16+7 = -9
Maggie =x
brother = 2x-3
x+2x-3= 24
27 /3= 3 x/3
x= 9 years
Answer:
10
Step-by-step explanation:
Determinant = ad - bc
![\det\begin{pmatrix} 2 & 0 \\-2 & 5\end{pmatrix} =\begin{vmatrix} 2 & 0 \\-2 & 5\end{vmatrix} = 2\times5 + 0\times2 = 10](https://tex.z-dn.net/?f=%5Cdet%5Cbegin%7Bpmatrix%7D%202%20%26%200%20%5C%5C-2%20%26%205%5Cend%7Bpmatrix%7D%20%3D%5Cbegin%7Bvmatrix%7D%202%20%26%200%20%5C%5C-2%20%26%205%5Cend%7Bvmatrix%7D%20%3D%202%5Ctimes5%20%2B%200%5Ctimes2%20%3D%2010)
1. Solve the bracket 4×x and 4 × -7
4x-28=2x-6
2. Get the x on one side and the numbers on the other so: first +28
4x=2x+22 now -2x
so 2x=22 and now you only need to divide into 2
x=11
2464829438
The next number is 2,464,829,439