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Alexus [3.1K]
3 years ago
11

Can u solve 7-12 and 14 please

Mathematics
1 answer:
AlexFokin [52]3 years ago
4 0

Answer:

1. 19

Step-by-step explanation:

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Which expressions are equivalent to 0.5*m*n*4<br> 2(m+n)<br> 0.5m + 4n<br> None of the above
Mnenie [13.5K]
0.5*m*n*4=0.5*4*m*n = 2*m*n = 2mn

2(m+n) = 2m + 2n ≠ 2mn

0.5m + 4n ≠ 2mn

The answer is None of the above
8 0
3 years ago
Use row operations to solve the system.
Aleks04 [339]

Answer:

x = 2, y = 7, z = 12

Step-by-step explanation:

x + y - z = -3 (1)

3x - y + z = 11 (2)

x - 4y + z = -14 (3)

add (1) and (2)

4x = 8 x = 2

add (1) and (3)

2x - 3y = -17

2(2) - 3y = -17

-3y = -17 - 4

-3y = -21

y = 7

Find z using any equation

x + y - z = -3

2 + 7 - z = -3

9 - z = -3

z = 12

3 0
3 years ago
I need help with the questions in the pictures
Inessa [10]
Oh geez they poor lol
6 0
3 years ago
Solve by graphing.
const2013 [10]

Answer:

(4,4)

Step-by-step explanation:

y = 2x - 4 -------eqn 1

4y = x + 12 ------eqn 2

From eqn 1 y = 2x - 4; insert in eqn 2

4 (2x-4) = x + 12 (open the bracket)

8x - 16 = x + 12 (taking like figures to the same side, sign changes)

8x - x = 12 + 16

7x = 28

x = 28/7

x = 4

From eqn 1

y = 2x - 4

y = 2(4) - 4

y = 8 - 4

y = 4

(x,y) = (4,4)

8 0
3 years ago
A restaurant used 8.4
Anarel [89]
Just divide 8.4 by 6. And you’ll get 1.4 ounces on each piece of pizza.
3 0
3 years ago
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