Class notes
Basic skills review unit assignment
- Course
- Institution
Written with Virtual high school (VHS)
[Show more]
Seller
Follow
studystar9touni
Content preview
Part 1 - Communication problems:Question 1:
a) An airplane needs to travel 400 km. Determine a function for the speed of the airplane, with
respect to time.
Distance travelled by plane = 400km
Let D be distance in km
Let t be time in hours
Let s be speed in km/h
𝑑 400
s(t)= 𝑡 = 𝑡
b) An ice cream cone is left sitting in the hot sun. Sarah notices that the ice cream melts and
loses half of its volume every 5 minutes. If the starting volume was 125 mL, determine a
function for the volume, with respect to the amount of time left out in the sun.
Volume of icecream cone = 125 ml
Let v be volume in ml
Let t be time in minutes
𝑡
v(t)=125 (2) 5
c) Scott wants to calculate the distance from his house to each of his friends' houses. If he drives
at 50 km/h, find a function for the distance, with respect to the number of hours it takes to travel.
Speed of Scott is 50km/h
Let s be speed in km/h
Let d be distance in km
Let t be time in hours
d(t) = 50(t)
Question 2
2
a) p=2𝑟 + 2𝑟 − 1 :
2
P+1 = 2(𝑟 + 𝑟) =
1 2 1
P+1=2[(r+ 2 ) − 4
] =
1 2 1
P+1=2(r+ 2 ) − 2
=
1 1 2
P+1+ 2 = 2(r+ 2 ) =
3
𝑦+ 2 1 2
2
= 2 (r+ 2 ) =
1 1 2
2
(𝑦 + 3) = (𝑟 + 2
) =
𝑦 3 1
+- 2
+ 4
= 𝑟 + 2
=
−1 1 𝑦 3
𝑟 = - 2 +− 2
+ 4
b) 3y+5x= 18
5y= 18-3x =
18−3𝑥
y= 5 =
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller studystar9touni. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.08. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
50843 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now