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daser333 [38]
3 years ago
9

2x + y = 13 What y????

Mathematics
2 answers:
hoa [83]3 years ago
8 0

Answer:

2(5) + 3 = 13

Step-by-step explanation:

x=5

y=3

2x+y=13

2(5)+3=13

10 +3 =13

kari74 [83]3 years ago
6 0

Answer:

Step 1

2x+y+-y = 13 +-y

2x=-y+13

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Find the perimeter of the triangle.<br><br><br><br><br>96<br><br><br>20<br><br><br>28<br><br><br>48
Gnesinka [82]

Answer:

Perimeter of the triangle is 48.

Step-by-step explanation:

First, you need to calculate all sides of the triangle. You know two of them and you can use Pythagoras Theorem for calculating the third side. Pythagoras Theorem is a²+b²=c²

Here, you know a and b. So 12²=144 ;  16²=256

144+256=400

Now, you need to find root.

√400=20

The third side (c) is 20.

Now you add up all sides.

20+12+16=48


I hope I helped! I will be glad, if you mark my answer brainliest

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3 years ago
Are these correct ? And help with number 3 please
alina1380 [7]
Yes, 1 & 2 are correct. 3 would be explaining how you got your answers. For example, you could use number 1 and say you thought about 10 x 3 equals 30 so 3 groups with 8 left over and so on or however your thought process went.
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