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2 years ago

9

Lisa puts $8,000 in an account that earns 12% simple annual interest. If she leaves her money in the account for 4 years, how mu

ch interest will she earn?

1 answer:

UkoKoshka [18]2 years ago

3 0

Answer:

392000

Step-by-step explanation:A=p(1+

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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

Please help me <br> Explain Step by step <br> Worth 15 points

solmaris [256]

Total monthly income = $5300
housing = 28%

= 28%*$5300
=(28/100)*$5300
=$1484

Letter C

7 0

3 years ago

Read 2 more answers

Question 6 (0.5 points)

Sunny_sXe [5.5K]

Answer:

Step-by-step explanation:

(9-6)/2 = 3/2 = 1.5

(-8-3)/2 = -11/2 = -5.5

(1.5, -5,5)

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3 years ago

What is the answer for -2(4x-4)+x

mezya [45]

Multiply the -2 with whats inside the brackets first, then simplify the equation.

-8x + 8 + x

-7x + 8

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3 years ago

Please help fast! Calculate the mean and explain the mean that would signify the entire population of fish by using this sample

mina [271]

Answer:

The answer is 2

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3 years ago