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r-ruslan [8.4K]
3 years ago
11

Please help! Add using a number line −2/5 +4/5 = ?

Mathematics
1 answer:
kobusy [5.1K]3 years ago
5 0

-  \frac{2}{5}  +  \frac{4}{5}  =  \frac{2}{5}
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Answer. First option: t > 6.25


Solution:

Height (in feet): h=-16t^2+729

For which interval of time is h less than 104 feet above the ground?

h < 104

Replacing h for -16t^2+729

-16t^2+729 < 104

Solving for h: Subtracting 729 both sides of the inequality:

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Multiplying the inequality by -1:

(-1)(-16t^2 < -625)

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Dividing both sides of the inequality by 16:

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Replacing t^2 by [ Absolute value (t) ]^2:

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Square root both sides of the inequality:

sqrt { [ Absolute value (t) ]^2 } > sqrt (39.0625)

Absolute value (t) > 6.25

t < -6.25 or t > 6.25, but t can not be negative, then the solution is:

t > 6.25



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3 years ago
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Find the area of the triangle below.
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Answer:

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Step-by-step explanation:

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