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3 years ago

Simplify the negative square root of negative 75

Mathematics

1 answer:

alekssr [168]3 years ago

7 0

he negative square root of negative 75

= - √-75

= - √(25 * 3 * i^2) ...............because i^2 = -1

= - 5i√3

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What is the volume of the pyramid

Vlad1618 [11]

Answer:

A=lw+l(w

2)2+h2+w(l

2)2+h2=14·20+14·(20

2)2+202+20·(14

2)2+202≈1016.84192

Step-by-step explanation:

That might be it,Im sorry tried

6 0

3 years ago

The atmospheric pressures at the top and the bottom of a building are read by a barometer to be 96.0 and 98.0 kPa. If the densit

expeople1 [14]

Answer:

Option d - 204 m

Step-by-step explanation:

Given : The atmospheric pressures at the top and the bottom of a building are read by a barometer to be 96.0 and 98.0 kPa. If the density of air is 1.0 kg/m³.

To find : The height of the building ?

Solution :

We have given atmospheric pressures,

$P_{\text{top}}=96\ kPa$

$P_{\text{bottom}}=98\ kPa$

The density of air is 1.0 kg/m³ i.e. $\rho_a=1\ kg/m^3$

Atmospheric pressure reduces with altitude,

The height of the building is given by formula,

$H=\frac{\triangle P}{\rho_a\times g}$

$H=\frac{P_{\text{bottom}}-P_{\text{top}}}{\rho_a\times g}$

$H=\frac{(98-96)\times 10^3}{1\times 9.8}$

$H=\frac{2000}{9.8}$

$H=204\ m$

Therefore, Option d is correct.

The height of the building is 204 meter.

4 0

4 years ago

Find the solution to the system of equations: x + 3y = 7<br> and 2x + 4y = 8

Lelechka [254]

Answer:

Point Form:

( − 2 , 3 )

Equation Form:

x = − 2 , y = 3

Step-by-step explanation:

Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.

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4 years ago

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krek1111 [17]

Answer:

You make a factor tree for (-)40 where the factors of -40 are -8 and +5. This becomes (x+5)(x-8) which can be multiplied to get back to the starting point.

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3 years ago

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larisa86 [58]

Adam pays for 2/5 of the meal so his father pays for 3/5

3/5 = 52.50
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so cost of the meal = 5 * 17.50 = $87.50

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3 years ago