X will be the speed of species b and 4x will be the speed of species a:
x + 4x = 180
5x = 180
x = 180 / 5
x = 36 m/h
If species b has a speed of 36 m/h, the speed of species a is 4 times that:
4 x 36 = 144 m/h.
Answer:

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Answer:
Step-by-step explanation:
4+3+5= 12 marbles
3/12 * 2/11 = 6/132 = 4.5%
Answer:
3.3
Step-by-step explanation:
2x+11+6x-7=180
8x+4=180
8x=176
x=22
MHT= 6x-7
125
AHM= 2x+11
55
Answer:
-15
Step-by-step explanation:
(-9)^2+9/-9+3
81+9/-6
90/-6
-15