Answer:
Step-by-step explanation:
Find c if ∠PQR = 90°?
I will ASSUME you mean point P is at (3. c)
slope of PQ is (2 - c) / (9 - 3) = (2 - c) / 6
slope of QR is (11 - 2) / (3c - 9) = 9 / (3c - 9)
perpendicular lines have negative reciprocal slopes.
(2 - c) / 6 = -1(3c - 9)/9
9(2 - c) = -6(3c - 9)
18 - 9c = -18c + 54
9c = 36
c = 4
Answer:
12.5
Step-by-step explanation:
(7/2) = 3.5
(3.5)^2 = 12.5
Answer:
it going down dividing by 2
Step-by-step explanation:
<span>2cos^2x = sin2x
2cos^2x = 2sin x cos x
(2sin x cos x) / (2cos^2x) = 1
sin x / cos x = 1
tan x = 1
x = π/4</span>
Answer:
$51.48
Step-by-step explanation:
Percent left: 100%-67%=33%
33% can also be expressed as the fraction 33/100
Then, 33% of 156 is 156*33/100=51.48
