A triangle has side lengths of 13, 9, and 5. Is the triangle a right triangle? Explain. 2Points
Use complete sentences in your explanation.

Hint: Pythagorean Theorem: a^2+ b^2 = c^2

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Solve this problem! extra ! 3025/5.5 = a/90.75