3 years ago

-4-square root of -75 / 60

Mathematics

1 answer:

Leto [7]3 years ago

3 0

<span>the correct answer is -4 - 0.144337567 i</span>

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The boy exits the stairwell at the 4th floor, which is 42 ft above the ground. How many seconds will it take him to get to the 4

Anit [1.1K]

Answer:2.41 s

Step-by-step explanation:

Given

Stairwell is at a height of $h=42\ ft$

and Height from where he starts $H=136\ ft$

Total height boy needs to cover is

$=H-h$

$\Rightarrow H-h=136-42=94\ ft$

using

$s=ut+\frac{1}{2}at^2$

where $s=displacement$

$u=initial\ velocity$

$a=acceleration$

$t=time$

$here\ initial\ velocity =0$

$94=0+\frac{1}{2}(32.2)(t)^2$

$t^2=5.83$

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3 years ago

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Ivanshal [37]

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2 years ago

The local service center advertises that it charges a flat fee of $50 plus $8 per mile to tow a vehicle. Write an equation that

salantis [7]

Answer:

50+8c

Step-by-step explanation:

Basically meaning 50 plus how ever many miles.

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3 years ago

The roots a and b of the quadratic equation x2+kx+12=0 are such that a-b=1. determine k.

zvonat [6]

Simplifying
x2+kx + -12=0

Recorder the terms: -12+kx+x2 =0

solving: -12+ kx + x2=0

now solving for variable 'K'

move all the terms containing K to the left, all other terms to the right.

Add '12' to each side of the equation.
-12+12+kx+ x2 =0+12

combine like terms: -12+12=0
0+kx +x2=0+12

combine like terms: 0+12=12
kx+x2+-1x2= 12 + -1x2

combine like terms: x2 + -1x2=0
kx+0 =12+-1x2
kx= 12+-1x2

divide each side by 'x'.
k=12x-1 + x

simplifying: K=12x -1 +-1x

Anw: K=12x -1+ -1x

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3 years ago

How do I solve and respond to this question?

Harrizon [31]

Answer:

i think its 6 and 8

Step-by-step explanation:

sorry if i get it wrong

can you tell me if it is right or wrong

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3 years ago