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3 years ago

Use the commutative law of addition to find an expression equivalent to 7(c+3)

Mathematics

1 answer:

Vlada [557]3 years ago

5 0

Answer:

7c+21

Step-by-step explanation:

multiply 7 by c and 7 times 3

7c and 21

7c+21

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Will mark brainless

iren2701 [21]

Answer:

Step-by-step explanation:

y = 3x + 2

6x – 2y = 10

Ryan’s answer:

I solved by adding the equations. The solution is .

y = 3x + 2 → 3x + y = 2

6x – 2y = 10 → 3x – y = 5

6x = 7

x =

6x – 2y = 10 → 6 – 2y = 10

7 – 2y = 10

–2y = –3

y = -

Jesse’s answer:

I used matrices. The solution is .

Mark’s answer:

I graphed the equations. The lines are parallel and do not intersect, so there is no solution.

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3 years ago

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Sidana [21]

Answer:

D I think

Step-by-step explanation:

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2 years ago

HELP ME PLEASE PLEASE

Ymorist [56]

Answer:

The value of x is 7 and y is 14.

Step-by-step explanation:

The steps are :

$- 3x + y = - 7 - - - (1)$

$y = x + 7 - - - (2)$

$(2)→(1)$

$- 3x + (x + 7) = - 7 \\ - 3x + x + 7 = - 7 \\ - 2x = - 14 \\ x = 7$

$substitute \: x = 7 \: \: into \: \: (2)$

$y = 7 + 7 \\ y = 14$

6 0

3 years ago

when three or more numbers are multipiled the product is the same regardless of the order of the multiplicands

BlackZzzverrR [31]

Answer:

Associative property of multiplication.

Step-by-step explanation:

7 0

3 years ago

Factorise the following:<br> c) x - 3x + 2

fenix001 [56]

Answer:

2 ( - x + 2 )

Step-by-step explanation:

x - 3x + 2 = - 2x + 2

- 2x = 2 * - x

2 = 2 * 1

- 2x + 2 = 2 ( - x + 2 )

Hence factorized.

8 0

2 years ago

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