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3 years ago

Which of the following best describes the solution to the equation below?

1 answer:

4 0

D)One solution. b=5
Distribute 2 times b plus 2 times 3
2b+6
2b+6+2b=26
Combine like terms 4b+6=26
Subtract 6 from both sides
4b=20
Divide both sides by 4
b=5

Check by substituting 5 for b
2 (5+3)+2(5)=26
2(8) + 2(5)=26
16+10=26
26=26

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Next time, please post in the physics section. It is not exactly a math problem because it requires knowledge of kinematics equations, assumptions and constants.

Given:

A rocket fired (assumed vertically upwards) at an initial velocity of +123 ft./s (positive upwards) against acceleration due to gravity of (assumed -32.2 ft/s^2) at an initial height of +4 feet above the ground. Need to find the time it takes before rocket reaches ground (assuming air resistance negligible) due to free fall.

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Using given numerical information

u=inivitial velocity=+123 ft/s

g=acceleration due to gravity= -32.2 ft/s^2

s0=initial location, height=+4 ft

s1=final local, height = 0 ft (ground)

We make use of the kinematics equation

s1=s0+u*t+at^2.............................(1)

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