A toy car is 10cm long. The scale to the real car is 1.5cm to 0.5m. How long is the real car?
3 1/3 meters
What equation shows a proportional relationship between x and y
y=kx
You buy 5 pizzas for $27.50. How much would 8 pizzas cost?
$44
Solve the proportion: 95/x=38/4
x=10
You go to a shop and buy pens and pencils. The pens cost $0.5 each and the pencils cost $0.35 each. You have $12 but want to have $2 left over. If you buy six pens how many pencils can you buy?
20
Denis ran 15km in 4 hours and Sharron ran 24km in 6 hours. Who was running faster?
Sharron was running faster.
A student scores, 36, 40, 33 and 45 in tests. What is their average percentage if all the tests were out of 50?
77%
20% of the students are in grade 6. There are 55 students in grade 6, how many students are there at the school?
275
If you do 8 hours of exams in one day and you take 3 exams. What is the unit rate? Give your answer to one decimal place.
2.7 hours per exam
What is the constant of proportionality ?
1.5 or 3/2 or 1 1/2
Find the average of these numbers 1,6,7,9,9,16
8
What should you do if you dont know what accuracy to give your answer to?
Say what you do. Fractions can help. Money should be two decimal places.
What are you ................. ?
COMPARING
Is a rational number always an integer?
NO. 1/2 is rational and not an integer.
If the top is x and the bottom is y. What equation relates the two variables?
y=7x
A laptop costs $450. Dave got a 15% discount, Chris paid $400. Who got the best deal and by how much?
Dave got the best deal, he paid $17.50 less than Chris
What is the percentage discount on a box of chocolate tea pots that is marked down from $350 to $280?
20%
A map has a scale of 10km=2.5cm, if you have walked 15km how many cm have you moved on the map?
3.75cm
You have $100 in the class account. You want to buy so much candy that everyone is sick. There are 24 students in the class and all the candy will cost $220. How much does each student need to contribute?
$5