Abhasra spent half of her week let allowance at the movies. to earn more money her parents let her clean the windows in the house for 7 dollars. what is her weekly allowance is she ended with 12

Her weekly allowance is $10

Step-by-step explanation:

Let's call x her weekly allowance

At the end she has $12. She obtained this for the addition of the money she earned cleaning windows ($7) and the half of her weekly allowance (the other half she spend it at the movies). Mathematically:

x/2 + 7 = 12

Solving for x:

x/2 = 12 - 7

x = 2*5

x = $10

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.