1 the equation is y=x+3 and yes y is directly proportional to x
2 the answer is c
3 the answer is c
4 the answer is b
The score which Lisa should get in her fourth exam of school to get exactly 80% in the course is 64.
<h3>What is the average of a group of numbers?</h3>
The average of the group of numbers is the ratio of the sum of all the numbers of the group to the total number of the group.
Lisa is currently taking physics as one of her electives in school.
Her grade at the end of the year is determined by the average of four exams, each worth 100 points.
- On her first test, she got an 84,
- On her second, she got a 92,
- On her third, an 80.
She got exactly 80% in the course. Let she scores x marks in her fourth exam. Thus,
![\dfrac{84+92+80+x}{4}=80\\256+x=80\times4\\x=320-256\\x=64](https://tex.z-dn.net/?f=%5Cdfrac%7B84%2B92%2B80%2Bx%7D%7B4%7D%3D80%5C%5C256%2Bx%3D80%5Ctimes4%5C%5Cx%3D320-256%5C%5Cx%3D64)
Hence, the score which Lisa should get in her fourth exam of school to get exactly 80% in the course is 64.
Learn more about the average here;
brainly.com/question/20118982
Answer:
Basic Formulas
sin θ = Opposite Side/Hypotenuse.
cos θ = Adjacent Side/Hypotenuse.
tan θ = Opposite Side/Adjacent Side.
sec θ = Hypotenuse/Adjacent Side.
cosec θ = Hypotenuse/Opposite Side.
cot θ = Adjacent Side/Opposite side.
Hope this helps :)
786 x 6 = 4,716 total miles
4716 divided by 13 = 362.769 minutes
362.769 dived by 60 = 6.046 hours
you can round it to however it needs to be.