A small island with a lighthouse is located 20 miles east and 30 miles North of City A. From the lighthouse you can see 10 miles in every direction.
b) Write an equation for the circle that marks as far as you can see from the lighthouse
c) If the boat travels at 10 miles per hour and leaves City A at time = 0, when and where
will you first be able to see the red boat from the light house? (What is the coordinate?
And the time?)
d) When and where will you lose sight of the red boat from the light house? (What is the
coordinate? And the time?)

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

2x + 8

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

the equation is not included but the answer is (1.50, 2.00, 2.75)

step-by-step explanation: