<span> 1.5(0.8x-1.2) = 0.2x+1.2
1.2x-1.8=0.2x+1.2
+1.8 +1.8
1.2x=0.2x+3
</span>
1.2x=0.2x+3
-0.2x -0.2x
x=3
Answer:
2 minutes
Step-by-step explanation:
18 divided by 9 = 2 minutes
Hope this helps :)
Let s be the speed of the slower plane; and s+83 be the speed of the faster one. Then:
3s+3(s+83)=3939
6s=3690
s=615
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Answer:your answer is c
Step-by-step explanation:if you want to be friends we can just friend me
9514 1404 393
Answer:
3.61 seconds
Step-by-step explanation:
The bird starts 50 feet in the air, so will come down to a height of 40 feet after 3.61 seconds.
We want to solve h = 40.
40 = -16t^2 +55t +50
16t^2 -55t -10 = 0
t = (55 +√(55^2 -4(16)(-10)))/(2(16)) = (55 + √3665)/32 ≈ 3.61060
The bird will be 40 ft above the ground the first time after about 3.61 seconds.