Find the measure of ∠a if ∠a = 3 2 x + 20 ∠b = 7 2 x + 20 ∠c = 5 2 x + 40 ∠d = 3 2 x + 10

65°

Step-by-step explanation:

Opposite angles in a cyclic quadrilateral are supplementary.

5

2

x + 40 +

3

2

x + 20 = 180

x = 30

then,

∠A =

3

2

x + 20

∠A =

3

2

(30) + 20 = 65

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.