If cos x = -4/5 and tan x > 0, the value of sin x is a) 3/5 b) 5/3 c) -5/3 d) -3/5

Observation #1:  if the tangent is + then x must be in Quadrant I or III.

Observation #2:  If the cosine is - then x must be in Quadrant II or III.

Thus, we know for certain that x must be in Quadrant III.  In Quadrant III, the "opposite side" of the angle in question is - and so is "the adjacent side."

Thus, if cos x = -4/5, the adj side is -4, the hyp is 5 and from the Pythagorean Theorem we know that the opp side is 3:  3^2 + (-4)^2 = 5^2.

Thus, sin x = opp / hyp = -3/5 (Answer d).

the answer is a

step-by-step explanation:

39.00 x 24 = total installment price

carrying installment price - cash price

needed to save the .00/

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!