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2 years ago

Can you please help me? 2.1.3

Mathematics

1 answer:

Nutka1998 [239]2 years ago

6 0

$~~(2I_2)A\\\\\\=2\begin{bmatrix} 1&0\\0&1 \end{bmatrix}\begin{bmatrix} 4&2\\3&-3 \end{bmatrix}\\\\\\=\begin{bmatrix} 2&0\\0&2 \end{bmatrix}\begin{bmatrix} 4&2\\3&-3 \end{bmatrix}\\\\\\=\begin{bmatrix} 8+0&4+0\\0+6&0-6 \end{bmatrix}\\\\\\=\begin{bmatrix} 8&4\\6&-6 \end{bmatrix}$

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murzikaleks [220]

Answer$33.60

Step-by-step explanation:

First I added 23 and 6 to get $29

Then I figured out that 20 percent of 23 was 4.6 and added that to 29.

I came out with an answer of 33 dollar and sixty cents.

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4 years ago

The variable Z is directly proportional to X. When X is 3, Z has the value 54. Wha is the value of Z when X= 12

RSB [31]

The variable Z is directly proportional to X
Z = kX (Where k is the constant of proportionality)
To find k
54 = k3

k = 54/3
k = 18

now find new Z

Z = 18X
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3 years ago

Your parents will retire in 20 years. They currently have $300,000 saved, and they think they will need $1,450,000 at retirement

Tanya [424]

N=20 periods (years)
present value, P = 300,000
future value, F= 1450000
i=annual interest rate

$F=P(1+i)^n$
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$(1+i)^{20}=1450000/300000$
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$i=(29/6)^{1/20}-1$
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Answer: they need to earn 8.1963% or more to achieve their goal.

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3 years ago

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4 years ago

Read 2 more answers

How to put 8x - 7y = 23 into slope intercept form

viva [34]

Y = mx + b is the slope intersect form.

so 8x - 7y = 23
-7y = -8x + 23
y = -8x/-7 + 23/-7
y = 8/7x - 23/7 Ans

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4 years ago