Answer:
3x-5y
Step-by-step explanation:
All you need to do here is combine like terms.
13x - 10x = 3x
2y - 7y = -5y
When they ask you to simplify the expression, they're not looking for you to solve anything. You just have to combine what you can. :)
The area of a parallelogram is base times hight, so you multiply the 6 and 18 to get 108!
Answer: there are eight bicycles and 7 tricycles.
Step-by-step explanation:
Let x represent the number of bicycles that are there.
Let y represent the number of tricycles that are there.
There are a total of 15 bicycles and tricycles. This means that
x + y = 15
A bicycle has 2 wheels and a tricycle has 3 wheels. There are 37 wheels all together if we count them up. This means that
2x + 3y = 37- - - - - - - - - - - - - 1
Substituting x = 15 - y into equation 1, it becomes
2(15 - y) + 3y = 37
30 - 2y + 3y = 37
- 2y + 3y = 37 - 30
y = 7
x = 15 - y = 15 - 7
x = 8
Andy's family drove 3000 meters. 1 kilometer =1000 meters
