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3 years ago

Grade 9 math plzz helpp a or b or c or d

Mathematics

1 answer:

hram777 [196]3 years ago

4 0

Answer:

$g(x) = 3^{x -4}$

Step-by-step explanation:

Given

$f(x) = 3^x$

g(x) = f(x) 4 units left

Required

Find g(x)

When a point is translated 4 units left, the rule is:

$x \to x - 4$

So, we have:

$g(x) = f(x-4)$

$f(x-4)$ is calculated as:

$f(x-4) = 3^{x -4}$

Hence:

$g(x) = 3^{x -4}$

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Given: A, B, and C What is the value of X in the matrix equation AX + B = C?

Ksju [112]

Answer:

Option (2)

Step-by-step explanation:

Given expression is, AX + B = C

$A=\begin{bmatrix}-3 & -4\\ 1 & 0\end{bmatrix}$

$B=\begin{bmatrix}-7 & -9\\ 4 & -1\end{bmatrix}$

$C=\begin{bmatrix}-42 & -20\\ 5 & 4\end{bmatrix}$

AX + B = C

AX = C - B

C - B = $\begin{bmatrix}-42 & -20\\ 5 & 4\end{bmatrix}-\begin{bmatrix}-7 & -9\\ 4 & -1\end{bmatrix}$ = $\begin{bmatrix}-42+7 & -20+9\\ 5-4 & 4+1\end{bmatrix}$

C - B = $\begin{bmatrix}-35 & -11\\ 1 & 5\end{bmatrix}$

Let $X=\begin{bmatrix}a & b\\ c & d\end{bmatrix}$

AX = $\begin{bmatrix}-3 & -4\\ 1 & 0\end{bmatrix}\times \begin{bmatrix}a & b\\ c & d\end{bmatrix}$

= $\begin{bmatrix}(-3a-4c) & (-3b-4d)\\ a & b\end{bmatrix}$

Since AX = C - B

$\begin{bmatrix}(-3a-4c) & (-3b-4d)\\ a & b\end{bmatrix}=\begin{bmatrix}-35 & -11\\ 1 & 5\end{bmatrix}$

Therefore, a = 1, b = 5

(-3a - 4c) = -35

3(1) + 4c = 35

3 + 4c = 35

4c = 32

c = 8

And (-3b - 4d) = -11

3(5) + 4d = 11

4d = -4

d = -1

Therefore, Option (2). X = $\begin{bmatrix}1 & 5\\ 8 & -1\end{bmatrix}$ will be the answer.

7 0

3 years ago

In right triangle ABC, the measure of angle A is 25 degrees, angle c is 90 degrees, and AB = 1. what is the length of AC?

Allisa [31]

Answer:

b= 0.9

Step-by-step explanation:

first you find angle B: 180-90-25=65

then you will do law of sine- sin A/a=sin B/b=sin C/c

sin(90)/1=sin 65/b

sin(90)*b=sin(65)*1

sin(90)*b=0.9

b=0.9/sin(90)

b= 0.9

8 0

3 years ago

Given CDEFG ≌ HIJKL and CD = 12, DE = 13, EF = 10, FG = 11, and GC = 8, what is HI?

Licemer1 [7]

CDEFG $\cong HIJKL \Rightarrow\overline{HI}=\overline{CD}$
$\\\Downarrow\\ \overline{HI}=12$

5 0

3 years ago

How to calculate 30% of 1500??

katrin [286]

$0.3\cdot1500=450$

5 0

3 years ago

Read 2 more answers

What is the solution?

galina1969 [7]

Answer:

y=60 x=16

Step-by-step explanation:

the triangles are identical so 92+y=3y-28 so solve that for y:

-y +28

120=2y . /2 /2

60 = y so y=60

and 6x+2=3x+50 and solve that for x: which gets x = 16

Then are you supposed to plug it in to the numerical equvilant to the angles and sides becuase if so: B and E is 152, AC and DF are 98

Hope this helps and brainliest would be greatly appreciated! Thanks!

4 0

2 years ago