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3 years ago

PLEASE HELP!!

Mathematics

2 answers:

Alja [10]3 years ago

4 0

Answer:

B choice

Step-by-step explanation:

$y = mx + b$

where m = slope and b = y-intercept.

The value of m is 3/4. That means slope is 3/4. Changing 3/4 to - 3/4 will make the slope become negative. Therefore the answer is B.

bearhunter [10]3 years ago

4 0

Answer: b) the slope of the line will change from positive to negative

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2 years ago

What set does 30 belong to

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2 years ago

NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h ( t ) = − 4.

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Answer:

$\displaystyle 1)48.2 \: \: \text{sec}$

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Step-by-step explanation:

<h3>Question-1:</h3>

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$\rm\displaystyle t = \frac{ - (229) \pm \sqrt{ {229}^{2} - 4.( - 4.9)(346)} }{2.( - 4.9)}$

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$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ {229}^{2} - 4.( - 4.9)(346)} }{2.( - 4.9)}$

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$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ 52441- 4( - 4.9)(346)} }{2.( - 4.9)}$

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$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ 45659.4} }{ - 9.8}$

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<h3>Question-2:</h3>

to figure out the maximum height we have to figure out the maximum Time first in that case the following formula can be considered

$\displaystyle x _{ \text{max}} = \frac{ - b}{2a}$

let a and b be -4.9 and 229 respectively thus substitute:

$\displaystyle t _{ \text{max}} = \frac{ - 229}{2( - 4.9)}$

simplify which yields:

$\displaystyle t _{ \text{max}} = 23.4$

now plug in the maximum t to the function:

$\rm \displaystyle h(23.4)- 4.9 {(23.4)}^{2} + 229(23.4)+ 346$

simplify:

$\rm \displaystyle h(23.4) = 3021.6$

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about 3021.6 meters high above sea-level the rocket gets at its peak?

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2 years ago

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Answer:

wait it is 325 of 3.25

Step-by-step explanation:

I can't tell if your asking for just one number, which would be 3.25...

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3 years ago