Answer:
1. Original amount of bicycle and helmet = $56.
2. Amount of money earned by the friend = $28.
Step-by-step explanation:
We are told that my friend sells me a bicycle for $63 and a helmet for $21 . The total cost is 150% of what my friend spent originally.
1. Let x be the original price of bicycle and helmet spent by my friend.
Amount spent by me on both helmet and bicycle will be
. We need to find x such that 150% of x equals 84. We can set this information in an equation as:
![1.50 x=84](https://tex.z-dn.net/?f=1.50%20x%3D84)
Therefore, my friend spent $56 on bicycle and helmet originally.
2. To find the amount of money earned by friend we will subtract amount spent by friend originally from amount spent by me on both items.
![\text{ Amount earned by my friend}=84-56=28](https://tex.z-dn.net/?f=%5Ctext%7B%20Amount%20earned%20by%20my%20friend%7D%3D84-56%3D28)
Therefore, my friend earned an amount of $28 by selling the bicycle and helmet to me.
Answer:
13. no. the value changes when you solve for them
14. yes identity
15. yes commutative
16. yes commutative
Answer:
![y = 27](https://tex.z-dn.net/?f=y%20%3D%2027)
Step-by-step explanation:
<h3>
![\frac{y}{3} - 5 = 4](https://tex.z-dn.net/?f=%20%5Cfrac%7By%7D%7B3%7D%20%20%20-%205%20%3D%204%20)
</h3><h3>
![\frac{y}{3} = 5 + 4](https://tex.z-dn.net/?f=%20%20%5Cfrac%7By%7D%7B3%7D%20%20%3D%205%20%2B%204%20)
</h3><h3>
![\frac{y}{3} = 9](https://tex.z-dn.net/?f=%20%5Cfrac%7By%7D%7B3%7D%20%20%3D%209%20)
</h3>
![y = 9 \times 3](https://tex.z-dn.net/?f=y%20%3D%209%20%5Ctimes%203%20)
![y = 27](https://tex.z-dn.net/?f=%20y%20%3D%2027)
<h3>Hope it is helpful...</h3>
Answer:
861 : 615
Step-by-step explanation:
7 + 5 = 12
246 ÷ 12 = 123
7 × 123 = 861
5 × 123 = 615
861 -65 = 246
Answer:
$85
Step-by-step explanation: