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I am Lyosha [343]
3 years ago
15

Help ne with this math

Mathematics
1 answer:
stira [4]3 years ago
6 0

The answer is A,E,G,L,D,and H.

You can check this by doing this:

This is for A

16*4=84

12*7=64

84+64=148

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(a+11)(a-1)

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Help mi out plz..... solve using matrix method​
HACTEHA [7]

Answer:

x = \frac{22}{7}

y = \frac{3}7}

Step-by-step explanation:

2x-3y=5\\5x=4y=14\\\\\left[\begin{array}{cc}2&-3\\5&-4\\\end{array}\right] \left[\begin{array}{c}x\\y\\\end{array}\right] =\left[\begin{array}{c}5\\14\\\end{array}\right]

Let A = \\\left[\begin{array}{cc}2&-3\\5&-4\\\end{array}\right]

The inverse of A multiplied by A = the identity matrix \left[\begin{array}{cc}1&0\\0&1\\\end{array}\right]

Inverse of A = \frac{1}{detA} \left[\begin{array}{ccc}-4&3\\-5&2\\\end{array}\right]

detA = ad - bc = -8 - - 15 = 7

Inverse of A = \left[\begin{array}{cc}\frac{-4}{7} &\frac{3}{7} \\\frac{-5}{7} &\frac{2}{7}\\\end{array}\right]

\left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{cc}\frac{-4}{7} &\frac{3}{7} \\\frac{-5}{7} &\frac{2}{7}\\\end{array}\right] \left[\begin{array}{ccc}5\\14\\\end{array}\right] = \left[\begin{array}{ccc}\frac{22}{7} \\\frac{3}{7} \\\end{array}\right]

5 0
3 years ago
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