What is the first step to prove that S,

2+4 + 6 + ... + 2n = n (n + 1) ?

Evaluate the expression. 5P4

What is the solution to the inequality a - 1 > 11

Carlos uses the numbers 3,7 and 21 to write facts. write an equation that is part of the set of related facts that carlos writes

You went to the mall with $80. You spend 25% of the money on shorts and 65% of the remainder on sandals. How much did the sandals cost?

Which equation has the solution x = 12? (A 4x + 3 = 45 B 5x - 8 = 68 2x - 5=29 3x + 6=42

What is a40 for the arithmetic sequence presented in the table below? n 8 12 an 60 48 Hint: an = a1 + d (n - 1), where a1 is the first term and d is the common difference

Chris was shown the graph of a line that contained (1,7). He wrote f (x) = 4x + 3 to correctly represent the line. Which of these equations could represent the same line.

A chess player won 2 games out of 20 what is the ratio to games lost to games won

How many solutions are there to the equation below? 220 = 2x-12x A) 1 B) 2 C) infinitely many

The simple interest x on an investment would take p dollars at an interest rate r or t years is given by x=prt. Find the time it would take to earn $900 in interest on an investment of $21,000 at a rate of 4.6%