At the beginning of an experiment, there are 400 grams of contaminants. Each hour, three-fourths of the contaminants are filtered out.

the entry fee at a small fair is $1.50 for children and $4.00 for adults. on a certain day 1900 people enter the fair and $4402.50 is collected how many children went to the fair?

Consider the sequence - 101, - 91, - 81, - 71, ... Determine an explicit formula for the nth term of the sequence.

10x-35+3ax=5ax-7a solve for "a" for which the equation is an identity.

Each figure represents a Real Number and no denominators are zero. Choose the correct statement and briefly explain why the others are not correct. A) a/b + c/d = a+c/bd B) a/b+c/d = a+c/b+d C) a/b+c/d = ad+bc/bd

R = 10,15,20 S=20,25 R u S =

Which represents how to find the nth term in this pattern? A 5n + 2 B 5n + 7 C 7n - 2 D 7n + 5

Lesson 9 solve for unknown angles using algebra

Can someone explain square Roots? Because i honesty just don't get it.

Question 4 When reading a music staff, you must read from the space to the

Will upvote 4,7,12,19,31, ... does this classify as a arithmetic, geometric, or neither