Serena has a dog washing company that charges a monthly fee of $16 plus $4 per wash. Rama also has a dog washing company that charges a monthly fee of $10 plus $6 per wash. At how many washes do both companies charge the same amount?

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220