Question

Which of the following expressions could represent how many health points the spell restores when Eiko is wearing the magic ring

Answer 1

b and c i got it right on khan academy

Explanation:

Answer 2

1. Without the ring Eiko healing spell restores H health points. This is 100%. After wearing the magic ring her power is increased by 30% and became X. Use proportion

H - 100%

X - 100%+30%=130%

to find X:

`(H)/(X)= (100)/(130),\\ \\100\cdot X=H\cdot 130,\\ \\X=(130H)/(100).`

This is answer form option B.

2. If without the ring Eiko healing spell restores H health points, then you can treat H as the whole 1·H. After wearing the magic ring her power is increased by 30%, that is
`(30)/(100)=(3)/(10)` from 1. Now with the ring Eiko healing spell restores
`\left(1+(3)/(10) \right)H` health points. This is answer C.

Answer: correct options are B, C.