4pairs of shoes cost $80. what is the cost of 7 pairs of shoes ?

140

Step-by-step explanation:

If 4 pair cost $80 then if you divide $80 into 4 groups you get $20.  Multiply $20 times 7 pairs of shoes and you get $140.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

the equation is not included but the answer is (1.50, 2.00, 2.75)

step-by-step explanation: