Answer:
The perimeter is the distance all the way around the outside of a 2D shape. To calculate the perimeter, sum the lengths of all the sides.
Therefore, perimeter of the triangle = (2x - 8) + (2x + 5) + (30 - 3x)
Collect like terms: 2x + 2x - 3x - 8 + 5 + 30
Combine like terms: x + 27
Therefore, perimeter of triangle = x + 27
We are told that the perimeter is 25:
x + 27 = 25
Subtract 27 from both sides: x = -2
If x = -2, then the side with equation 2x - 8 = (2 x -2) - 8 = -12
A length cannot be negative, therefore the perimeter cannot equal 25.
Answer:
The y coordinates become the opposite of what they already are.
Step-by-step explanation:
Example: (3,2) -> (3,-2). (-4, -7)-> (-4,7)
Answer: 345.02
Step-by-step explanation:
The sample space is all the possible outcomes from a trial/trials;
In this case, it is all the possible coins that you can pick from;
If you are picking multiple coins, how many of each and in what order you pick them also contribute to the sample space, i.e. they produce other possible outcomes:
<span>7 quarters, 2 dimes, 5 nickels or 11 pennies.
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