Classify the triangle formed by these three sides 5, 12, 15 -not a triangle
-acute
-right
-obtuse

Right

Step-by-step explanation:

whenever you draw it and you have 15 as the hypotenuse and 12 and 5 as the legs it makes sense.

obtuse

Step-by-step explanation:

Given 3 sides of a triangle a, b, c ( where c is the longest ) , then

• If a² + b² = c² ⇒ right

• If a² + b² > c² ⇒ acute

• If a² + b² < c² ⇒ obtuse

Here c = 15 , then c² = 15² = 225

5² + 12² = 25 + 144 = 169

Since 5² + 12² < 15² then triangle is obtuse

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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