Find the measure of ∠a if

∠a =
3/2x + 20
∠b =
7/2x + 20
∠c =
5/2x + 40
∠d =
3/2x + 10

a) 55°
b) 65°
c) 76°
d) 104°

Our goal is to collect email addresses from 60% of customers who purchase a product." so that means if i talk to 95 customers, i need to persuade to provide an email address?

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)

Quadrilateral abcd is translated up and to the right, and then rotated about point q. which congruency statement is correct?