Suppose Elena has $5 and sells pens for $1.50 each. Her goal is to save at least $20. Write an inequality to show the number of pens Elena needs to sell to reach her goal. Hint: You may need to use the "relationships"

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11