Verify the identity algebraically. Use a graphing utility to check your result graphically. 4 cote 4 csc 0 + 4
CSC 0 - 1 coto
Multiply the numerator and denominator by a common expression, and then use a Pythagorean Identity to simplify
4 cote 4 cote
CSC 0 + 1
CSC 0 - 1 CSC 0 - 1 1
x
(4 cot 0)(CSC 0 + 1)
(4 cot 0)(CSC 0 + 1)
II
=
cote

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

more detail

step-by-step explanation:

addition

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional