(sets) Use U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10), A = {2, 3, 4), B = {4, 7, 8, 9), and C = {3, 4, 9} to find the given set.
AUB
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. ĀUB = { }
(Use a comma to separate answers as needed.)
B. The solution is the empty set.

nothjing

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

d secondary market mark brainliest