Answer: y=-2x+8
Step-by-step explanation: Write a table of values where for every x y goes down 2 to find the y intercept (0,8) so it would be 8. The slope is -2 and that is all you need to write the equation.
There are 63 students in the room, this is because 21 time 3 gives you 63.
“Three decimal places” is the same as “the nearest thousandth.” So, for example, if you are asked to round 3.264 to two decimal places it means the same as if your are asked to round 3.264 to the nearest hundredth. Some questions, like the example below, will ask you to “show your answer correct to two decimal places."
It would take Curtis 45 minutes to ride his bike to Jean's house.
<u>Answer</u>

<u>Detailed Explanation </u>
Let's set up a proportion.

Now that we have set up a proportion we would need to cross multiply.
3*x=3x
40*4.8= 192
Solve for x


Therefore, the answer would be 64.