B) 196 cubic cm or something like that... First you multiply 7x5x14=490... then you divide 490/5 because you're working in fifths and get 98... the white is only two-fifths so you multiply 98 times 2 and get 196
Answer:
D 21.80°
Step-by-step explanation:
Let x = measure of the angle
Tan x = 12000/30000 = .4
Arctan .4 = 21.80°
Answer:
Alyssa work at job A 
Step-by-step explanation:
Let
x------> the number of hours at work A
y------> the number of hours at work B
we know that
-----> equation A
-----> equation B
substitute equation A in equation B






let's recall that perpendicular lines have negative reciprocal slopes, so say for a line with a slope of a/b

a perpendicular one will be -b/a.
what does that mean? well, that the lines are perpendicular of course, they meet at a 90° angle, and two straight lines meeting at 90° can only meet once.
since a solution to a system of equations is where the graph meet, and these two meet perpendicularly once, then that means only one solution.