1 year ago

G(x) = -x - 2, find g(-5).

Mathematics

1 answer:

Elena L [17]1 year ago

7 0

Answer:

Step-by-step explanation:

to solve this equation, put in -5 for x

g(x)=-(-5)-2

g(x)=5-2

g(x)=3

You might be interested in

-x=-y+2 and 3y+4=2x solve using matrices

MissTica

$\begin{cases}-x=-y+2\\3y+4=2x\end{cases}\implies\begin{cases}x-y=-2\\2x-3y=4\end{cases}$

In matrix form, this is

$\begin{bmatrix}1&-1\\2&-3\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-2\\4\end{bmatrix}$

The coefficient matrix has determinant

$\begin{vmatrix}1&-1\\2&-3\end{vmatrix}=-3+2=-1\neq0$

so it has an inverse, which is

$\begin{bmatrix}1&-1\\2&-3\end{bmatrix}^{-1}=\begin{bmatrix}3&-1\\2&-1\end{bmatrix}$

Multiply both sides by the inverse matrix:

$\begin{bmatrix}3&-1\\2&-1\end{bmatrix}\begin{bmatrix}1&-1\\2&-3\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}3&-1\\2&-1\end{bmatrix}\begin{bmatrix}-2\\4\end{bmatrix}$

$\implies\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-10\\-8\end{bmatrix}$

so that $x=-10$ and $y=-8$ .

8 0

3 years ago

9 /5 = 6 5 /x how to solve step by step

ziro4ka [17]

<h2>Answer: $x=\frac{325}{9}$ </h2>

Step-by-step explanation:

Cross-multiply.
Divide both sides by 9.

4 0

3 years ago

Calculate the distance between points (0,0) and (4, 6) on the coordinate plane.

abruzzese [7]

4 up and 6 right

i hope this helped

5 0

3 years ago

the ratio of pink marbles to white marbles in Samaras bag is equal to 1:5. what percent of the bag contains pink marble

kenny6666 [7]

1:5= 1/5 x 20/20= 20/100

20/100= 0.20

The bag contains 20% of pink marbles.

3 0

4 years ago

By what numbers would you need to multiply the two equations in order to eliminate y? By

WARRIOR [948]

You have to divide the numbers that do not have the variable y in it.

3 0

3 years ago