The angle internal to the triangle at B is the supplement of the one shown, so is 65°. That is equal to the angle internal to the triangle at D. Since the vertical angles at C are congruent, the two triangles are similar by the AA theorem.

Corresponding sides of similar triangles are proportional, so we can write the proportion shown in the attachment:

BC/FC = DC/AC

BC = FC(DC/AC) = 21.6(7.2/9.6)

BC = 16.2 . . . . matches the first choice

4 0

3 years ago

The taxi costs $2.25 for the first mile plus 15cents for each additional tenth of a mile. For a 5.2 mile trip, Eric payed $10 an

Verizon [17]

2.25 for the first mile. That leaves 4.2 miles.

4 * 0.1 = 0.4

0.15 * 4 = $6.00

0.15 * 2 = 0.3

$6.30 + $2.25 = $8.55

$10.00 - $8.55 = $1.45

The driver's tip was $1.45.

7 0

2 years ago

I the revenue for the week is $2000, and labor cost consists of two workers earning $8 per hour who work 40 hours each, what is

MA_775_DIABLO [31]

Revenue = $2000

Labour cost = 40 x 8 = $320

Percentage = 320/2000 x 100 = 16%

Answer: 16%

4 0

2 years ago

2. Solve the system of equations by elimination 8x + 14y = 4 -6x -7y = 10

diamong [38]

Answer:

This is the answer of your question.

3 0

3 years ago