The total distance traveled is 4 km, which is equal to 4000 meters. This is equal to the area under the graph, so $400T-\frac{1}{2}(100-V)(5T)=4000$ .

$400(100-4T)-\frac{1}{2}(4T)(5T)=4000\\\\40000-1600T-10T^2=4000\\\\10T^2 +1600T-36000=0\\\\T^2 +160T-3600=0\\\\(T+180)(T-20)=0\\\\T=20 (T > 0)\\\\\therefore V=100-4(20)=20$

6 0

1 year ago

Jobisdone [24]

Remember for any two polygons

Area of polygons is directly proportional to square of sides

BC²/XY²=135/15
15²/XY²=9
(15/3)²=XY²
XY=5in

#35

HJ²/XY²=168/378
8²/XY²=0.44
XY²=64/0.44
XY²=145.45
XY\approx 12+

3 0

2 years ago

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what is the inverse of h(x)=12e^2x. based on your answer write an expression write an expression equivalent to where x is h of 1

dezoksy [38]

Let y = 12 e^2x

e^2x = y/12
Taking [email protected]
ln e^2x = ln (y/12)

2x = ln (y/12)

x = (1/2) ln (y / 12)

so the inverse h-1(x) = (1/2) ln ( x / 12)

3 0

3 years ago

Los 3/4 de un número es 120. ¿Cuál es el número?

Marina CMI [18]

Maybe...... E if that’s not right then try..... b

5 0

3 years ago

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