Answer:
answer
Step-by-step explanation: step-by-step explanation
There would be about 1,283,792 scores below 640.
The 87th percentile means that 87% of the scores are below 640. All we need to do is multiply the total number of scores by 0.87 and we will have the number below 640.
Use the formula (b/2)^2 in order to create a new term. Solve for x by using this term to complete the square.
x = 1 ±
Answer:
X=-5/2
Step-by-step explanation:
First for Y=2x+5 you change the y into 0
Then you replace the 0 with 2x but change the sign so it will be -2x so it will look like -2x=5
then you divide both sides by 2
Finally you get -5/2
Hopefully this helps