An athlete took forward and backward steps of equal distance to warm up before his race. after taking 10 steps total, he was back at his starting position. how many steps did the athlete take in the forward and backward directions?
3 steps forward and 7 steps backward
4 steps forward and 6 steps backward
5 steps forward and 5 steps backward
6 steps forward and 4 steps backward

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

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