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raketka [301]
3 years ago
11

What is the area of a triangle with the perimeter of, 15cm, 19cm, and 12cm?

Mathematics
1 answer:
ANEK [815]3 years ago
3 0

Answer:

89.9778 cm

Step-by-step explanation:

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Which of the following is a solution to the system of<br> equations?<br> 4 + y = -x<br> y = 2x - 10
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Answer:

x=3, y= -6

Step-by-step explanation:

make 4+y= -x as equation (1) and make y=2x-10 as equation (2, then you must find a third equation either from equation (1)or (2). If you choose to find equation (3) from (2) it will be y=2x-10 , then substitute equation (3) from (1) because you can't choose (2) , then it will be 4+(2x-10)= -x

the answer will be x =2

substitute x from equation (3)

y=2x-10

y=2 (2)-10

y= -6

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