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Which property is illustrated by the following equation?
3/5 + (-7/8) + 4/5 = 3/5 + 4/5 + (-7/8)
a. commutative property of addition
b. addition property of equality
c. associative property of addition
d. identity property of addition

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.

What are the interpretations of the line 3x - 15y = 60? x-intercept y-interception a: x 20 - y -4 b: x 5 - y 20 c: x -3 - y 15 d: x -4 - y 20

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120