3 years ago

The matrix below represents a system of equations. (Image) What is the solution to this system of equations

Mathematics

1 answer:

solniwko [45]3 years ago

4 0

Answer:

Step-by-step explanation:

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What is the value of x? Enter your answer in the box. x =

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Read 2 more answers

Does anyone know the answers to this questions

steposvetlana [31]

Answer:

6c + 36 = 6(c+6)

(6*c) + (6*6) = 6(c+6)

2(3c+3) = 6c+6

(6+c)+(6+6) = neither

3c+6+3c = 6c+6

6c+12 = neither

correct me if I am wrong cuz i haven't done this in 2 years

Step-by-step explanation:

going across the top row then the bottom

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Keiko has seven colors of lanyard. She uses three different colors to make a keychain. How many different combinations can she c

AleksAgata [21]

Combination = doesn't matter what order
Permutation = order matters

There are <u>two</u> methods to work out combinations.

Method 1 List out possibilities
123 124 125 126 127 134 135 136 137 145 146 147 156 157 167
234 235 236 237 245 246 247 256 257 267
345 346 347 356 357 367
456 457 467
567

For a total of 35 combinations.

Method 2 Use a formula.
It's a rather complicated one, so only use it if you have a lot of possibilities.

$\frac{n!}{r!(n-r)!} = \frac{7!}{3!(7-3)!} = \frac{7!}{3!*4!} = \frac{7*6*5*4*3*2*1}{3*2*1*4*3*2*1} = \frac{7*6*5}{3*2*1}=\frac{210}6=35$

(n is the number of choices, r is the amount you choose, and ! is a function that multiplies together all numbers down to 1)

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3 years ago