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Drupady [299]
3 years ago
11

Can someone help me with this please?

Mathematics
1 answer:
11111nata11111 [884]3 years ago
6 0
The perimeter is
2(2z+3z-3)=44
\Rightarrow 2(5z-3)=44
\Rightarrow 10z-6=44
\Rightarrow 10z=50
\Rightarrow z=5

The length of AB is
3z-3=3(5)-3=15-3=12
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Solve each system of equation using any method.<br> 7 x + y = 5 2x - y = 4
nexus9112 [7]

Answer:

x = 1

y= -2

Step-by-step explanation:

to solve this system of equation , simultaneously using the substitution method

we say let

7 x + y = 5 ............................................. equation 1

2x - y = 4 ................................................... equation 2

from equation 2

2x - y = 4 ................................................... equation 2

2x - 4 = y

y = 2x -4.......................................................... equation 3

put the value of the y = 2x -4 into equation 1

7 x + y = 5 ............................................. equation 1

7x + 2x - 4 = 5

9x-4 = 5

9x = 5 + 4

9x = 9

divide both sides by the coefficient of x which is 9

9x/9 = 9/9

x = 1

substitute the value of x = 1 into equation 3

y = 2x -4.......................................................... equation 3

y = 2(1) -4

y = 2 - 4

y = -2

to check if you are correct put the value of x and y into any of the equations and you will see that the left hand side will be equal to the right hand side.

2x - y = 4 ................................................... equation 2

2(1) -(-2) = 4

2 + 2 = 4

4=4................................... proved

7 0
3 years ago
I need help on all of these please help i’ll mark brainliest!!! <br> -11 + x = 7X - 5
nalin [4]

I don't know what your looking for, so be more specific, but I'm assuming your solving for x, so that's would be

x = -1

8 0
2 years ago
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A recipe for 12 apple cinnamon muffins calls for 1 cup of flour. The number of muffins that can be made varies directly with the
White raven [17]

Answer:

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Step-by-step explanation:

1 cup will get you 12 muffins. Since you have 3/4 cups left over, you have to find 3/4 of 12. 1/4 is equal to 3. 3x3 equals 9. 12+9 equals 21.

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adell [148]

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Determine the rate of change for the graph from 2010 to 2012​
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