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➷ A) (2/7 x 2/7) + (2/7 x 5/7) + (5/7 x 2/7) =
4/49 + 10/49 + 10/49 = 24/49 <== this is the answer
B) (2/7 x 1/6) + (2/7 x 5/6) + (5/7 x 2/6) -
2/42 + 10/42 + 10/42 = 22/42 <== this is the answer
The second answer could be simplified to 11/21 (only write this answer if it wants the simplified version, otherwise write the one above)
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↬ ʜᴀɴɴᴀʜ ♡
Answer: I dont use it for that. Sometimes, yes i need help but i read the explanation, and mainly i just answer
Step-by-step explanation:
Hello,
g=9.81m/s²= 9.81/0.3048 =32.18.. ft/s² rounded to 32
h=-g/2*t²+vt+h0
if t=0,h=0 ==>h0=0
==>h=-16*t²+vt
50 ft in 2.5s ==> 25 ft in 1.25s
25=-16*1.25²+v*1.25
==>v=50/1.25=40
Equation h=-16t²+40*t
When you multiply both sides by a negative value you make the side that is greater have a "bigger" negative number, which actually means it is now less than the other side! This is why you must flip the sign whenever you multiply by a negative number.