Three sides of a quadrilateral measure 2.5 centimeters, 1.8 centimeters, and 9 centimeters. if the perimeter of the quadrilateral is 20.9 centimeters, what is the length of the fourth side?

34.2 cm
15.7 cm
7.6 cm
7 cm

what do you mean by fog

step-by-step explanation:

answer: x=3 and y=4

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6