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Tpy6a [65]
2 years ago
13

Benin is sawing boards to make a deck. What is the area of the deck?

Mathematics
1 answer:
Elan Coil [88]2 years ago
3 0

Answer:

A

Step-by-step explanation:

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Can anyone please help me with this? i need a step by step explanation please! very appreciated:)
EastWind [94]

Answer:

Step-by-step explanation:

x and y are variables. That means they represent numbers that are unknown. When we solve for x or y, we are trying to find what number the variable represents.

Y is a number that equals both 5x-9 and 3x+7. If it is a number, it can only have one value, so we can say that 5x-9 and 3x+7 have the same value.

In other words, 5x-9 = 3x+7.

Another way of thinking about this step is substitution. y=3x+7, so in the equation y=5x-9, we can replace the y with 3x+7. It will give 3x+7 = 5x-9.

In either case, we have this new equation

5x-9 = 3x+7.

From here it's just simple algebra- subtract 3x from each side

2x -9 = 7

and add 9 to each side

2x = 16

and divide each side by 2.

x = 8.

All these steps work because if two things equal each other, when you do the same thing to both of them (such as add 9), the new values will still equal each other.

Now that we know that x = 8, we can take one of the original equations

y=5x-9

and put 8 in for x.

y=5*(8) -9.

If x represents the value 8, we can obviously switch out x for 8.

Now simplify

y=40 -9

y = 31

Now we know that x = 8 and y = 31.

5 0
2 years ago
Read 2 more answers
Y-(5-(y-x)) x = 4 y = 6<br><br> I need the steps please, this is a little bit confusing..
KATRIN_1 [288]

Answer:

3

Step-by-step explanation:

substitute x = 4 , y = 6 into the expression

y - (5 - (x - y))

= 6 - (5 - (6 - 4))

= 6 - (5 - 2))

= 6 - 3

= 3

3 0
2 years ago
A regular hexagon is shown below. Find the value of x.<br> (11x + 21)°
noname [10]

Answer:

x=9

Step-by-step explanation:

The expression is for the interior angle of the hexagon; one interior angle is equal to .

Since an interior angle of a hexagon measures 120°, we have the equality

.

Now it is just a matter of solving for  

11x=120-21

11x=99

x=99/11

x=9

4 0
3 years ago
Factor<br> 15x^3 – 25x^2 + 75x– 125
Semenov [28]

Answer:

5(3x-5) × (x²+5)

Step-by-step explanation:

Follow me Please

5 0
2 years ago
Please answer correctly !!!! Will mark brainliest !!!!!!!!!!!!
vfiekz [6]

Answer:

I believe that your answer is a

Step-by-step explanation:

I remember that the exponent would be multiplied by both sides.

6 0
3 years ago
Read 2 more answers
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