Answer:
S=32.5
W=97.5
Step-by-step explanation:
S=speed of plane in still air
W=speed of wind
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3(S+W)=130
6(S-W)=130
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S+W=43.33333...
S-W=21.66666...
2S=64.999...
S=32.5(simplified)
-----------------------------------------
32.5+W=130
W=97.5
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.222---(best answer) or 4/18 or 20/90. (.222---) is 2 divided by 9.
Answer: 1 1/35
Step-by-step explanation:
12/7 divided by 5/3 (simplified equation)
12/7 (reciprocal of 5/3) times 3/5
36/35= 1 1/35
Answer:
Step-by-step explanation:
Scale factor is 1:5
create a proportion: 1/5 = x/1450
cross multiply: 5x = 1450
divide both sides by 5
x = 280 blocks
Answer:
1) null: π = 0.5, alternative: π > 0.5
2)p^= 80/124 =0.645
std error =(phat(1-phat)/n)1/2 =0.0430
3)z = (phat-p)/std erro =(0.645-0.5)/0.0430 =3.22
4)The observed proportion of couples who leaned to the right when kissing is 3.22 standard deviations above the null hypothesized value of 0.50
5)We have strong evidence that the proportion of couples that lean their heads to the right while kissing is more than 50%