Answer:
21 plays a sport and takes a foreign language.
17 takes a language and does not play a sport.
12 play a sport and don't take language.
4 student don't do either
Step-by-step explanation:
Answer:
Step-by-step explanation:
Looking at the diagram,
Line DT is parallel to line line BM, therefore, triangle DHT is similar to triangle BHM. This means that
DH/DB = TH/MH
DH = 15 + 6 = 21
TH = 9 + x
Therefore
(9 + x)/21 = 9/6
Cross multiplying, it becomes
6(9 + x) = 21 × 9 = 189
54 + 6x = 189
Subtracting 54 from the left hand side and the right hand side of the equation, it becomes
6x + 54 - 54 = 189 - 54
6x = 135
Dividing the left hand side and the right hand side of the equation by 6, it becomes
6x/6 = 135/6
x = 22.5
<span> -7 -7
------------------- = ---------------------
x^2 -2x -15 (x - 5)(x + 3)
x </span>≠ 5 and x ≠ -3
answer
<span>-3 and 5</span>
