Nancy spent half of her allowance going to the movies. she washed the family car and earned 7 dollars. what is her weekly allowance is she ended with 13 dollars?

(17-7)*2=weekly allowance

so her weekly allowance is 20

Step-by-step explanation:

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3

step-by-step explanation: