Francesca bought 27 key chains of two different kinds to make goody bags for her birthday party. supergirl key chains were $3 and wonder woman key chains were $2. she spent $73. how many key chains of each kind did she buy?

a) what number, when added to negative four, is equal to negative five?

step-by-step explanation:

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b

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