The question is asking "how many substances has their mass recorded" to find the answer you would simply count how many substances (the dots above the graph) there are. After counting you will see that there are 13 which is the answer to your question.
Hope this helps! :)
Rita weighs 11 1/4 pounds
(sry but ask someone else for the decimal)
Well if its horizontal, then the equation would be y=-2
Hello! To solve this equation, let's set it up like this: 75 + 20m = 35m. This is because Company B does not charge an upfront fee, so all you have to do is 35m and Company A charges $75 upfront and then $20 per month, so you do 75 + 20m. First, you subtract 20m from both sides. When you do, you get 75 = 15m. Now, you divide each side by 15 to isolate the m. When you do that, you get 5. Let's plug in the numbers to see what we get. 20 * 5 is 100 + 75 = 175. 35 * 5 =175. 175 = 175. There. The two companies will charge the same amount in 5 months. m = 5.
Option A he would be paid:
$15 per session
Option B he would be paid:
$20 per session
Equations
A: Y = 15x + 17250
B: Y = 20x + 14000
When X = 650 the Y values of A and B are equal.
<em>After 650 training sessions, they would be equal.</em>