21. Shelly has a cell phone plan that costs $9.99 per month plus $0.05 per minute. Her total bill for the month is $25.59. Write and solve an equation to find how
many minutes she used for the month.

25.59-9.99 that answer divided my 0.05 (312 minutes)

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.