What is the value of x in the equation 2(x - 4) - 4(2x + 1)?
1 answer:
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Answer:
Step-by-step explanation:
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Let's find the surface area of the pink rectangular prism first.
The surface area for the pink rectangular prism is
.
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Now, let's find the surface area of the green rectangular prism.
The surface area for the green rectangular prism is 144 .
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Now let's add the surface area of both rectangular prisms to find the surface area of the composite figure.
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Hope this is helpful.
h(t) is the height of the diver in feet above the water
Now it asks about the time at which diver reaches the water
When diver reaches the water , the height of diver from water should be zero
So we plug h(t) =0
So
divide whole equation by -16
we can now factor the quadratic equation
So we get
(t+4)(t-3) =0
plug each factor equal to zero and solve for t
t+4 =0 and t-3 =0
So t=-4 and t=3
Now time cannot be negative , So t=3
So time = 3 seconds
It takes 3 seconds for the diver to reach the water