575 / 5 = 115
Dora has saved $115 per month.
Answer:
5
Step-by-step explanation:
2+3+5
Step-by-step explanation:
A. No, the sample is not random. The sampling is biased because he limits his selection to only seventh graders.
B. The sample <em>is</em> random. The fact that all the students selected were eighth graders is coincidence, not bias. The sampling method was still random.
In an equation using x is just a place holder because those numbers are variables so it doesn't matter whether it is x or w.