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arlik [135]
3 years ago
12

Explain why -4 is not a real number but -8 is two equations below of what they look like

Mathematics
1 answer:
Margarita [4]3 years ago
7 0

-4 isn't a real number because there is no square root of -4. However, there is a cube root of -8, because -2 * -2 * -2 = -8.

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2. A company ships 16 bags of coffee in each box. They ship a total of
lidiya [134]
Wweel if it weighs 20 then it should be 8 ounces of coffe
8 0
3 years ago
Steel loading ramps are used to load a lawn mower onto a truck bed 37.5 inches above the ground. If the ramp make a 30° angle wi
scoray [572]

Answer:

6.25 feet.

Step-by-step explanation:

Please find the attachment.

Let L be the length of the ramp in feet.  

We have been given that steel loading ramps are used to load a lawn mower onto a truck bed 37.5 inches above the ground. The ramp make a 30° angle with the ground.

We can see from our attachment that ramp and truck bed forms a right triangle with ground. The truck bed is opposite side and length of ramp is hypotenuse of our given angle.

Since we know that Sine relates the opposite and hypotenuse of a right triangle, so we will use Sine to solve for L.

\text{Sine}=\frac{\text{Opposite}}{\text{Hypotenuse}}

Upon substituting our given values in above formula we will get,

\text{Sin(30)}=\frac{37.5}{L}

L=\frac{37.5}{\text{Sin(30)}}

L=\frac{37.5}{0.5}

L=75

Therefore, the length of the ramp is 75 inches.

Let us convert the length of ramp in feet.

1 feet = 12 inches.

\text{75 inches}=\frac{75\text{ inches}}{\frac{12\text{ inches}}{\text{feet}}}

\text{75 inches}=\frac{75\text{ inches}}{12}\times \frac{\text{ feet}}{\text{inches}}

\text{75 inches}=\frac{75}{12}\times\text{ feet}

\text{75 inches}=6.25\text{ feet}

Therefore, the length of the ramp is 6.25 feet.

7 0
3 years ago
Read 2 more answers
Write the equation in slope-intercept form for the line with the given slope that contains the given point.
Roman55 [17]

Answer:

D) y = 1x + 2

Step-by-step explanation:

The general structure of an equation in slope-intercept form is:

y = mx + b

In this equation, "m" stands for the slope and "b" stands for the y-intercept. You can substitute the given value of the slope into the equation. Since you are not given "b", you can plug the value of the points into the half-completed equation (with the slope) and isolate "b".

slope = m = 1

y = (1)x + b

(3,5) ------> y = 5 and x = 3

5 = 1(3) + b

5 = 3 + b

2 = b

Final Equation:

y = 1x + 2

8 0
2 years ago
Guys!Please helpp!!Emergency !I need that beforr 10:15 pm!!
pantera1 [17]
Y=mx+b
Y= 1= 10
1 x 10
4 0
3 years ago
Need help asap will give brainly
Leviafan [203]

A      

                              The Second Industrial Revolution was another great leap forward in technology and society. New innovations in steel production, petroleum and electricity led to the introduction of public automobiles and airplanes. You wanna know how everything began? Let's see

The Second Industrial Revolution, which began in the middle of 19th century (1850-1970). It was a period of growth for pre-existing industries and expansion of new ones; such as the steel, oil and electricity fields. The development of new technologies led to the introduction of two things that would change the world: public transport and planes.

During the Second Industrial Revolution, the existing manufacturing and production methods were improve. For instance, steel replaced iron in the building business. It was strong and it was cheap. So, it made possible to build rail lines at competitive cost and spread transportation. Steel also facilitated the construction of ships, skyscrapers and larger bridges.

Steel displaced iron because it was stronger and cheaper

Although the Second Industrial Revolution happened just a few years after the first Industrial Revolution, it was as big of a leap forward as its predecessor. If you are reading this now, surely you can't imagine a world without electricity! But at the time of the Second Industrial Revolution, this was the norm.

Faraday started playing with the idea of electricity. Then, a few years later, Edison and Swan perfected their design of a lightbulb which was practical for home use.

This, in addition to the appearance of the first efficient commercial electrical generators in the 1870s, made public electricity possible.

Swan took his incandescent lightbulbs to England. The English used Swan's lightbulbs to light Mosley Street in Newcastle upon Tyne. So, this was the first electrical street lighting installation in the world. Then, Swan gifted the Savoy Theatre in London with 1,200 of his lightbulbs. Thus making it the first public building to be lit entirely by electricity.

Mosley Street and the Savoy Theatre set the stage for the first large-scale power station. It was located at the Holborn Viaduct in London. Then followed the power station at Pearl Street in New York. Afterwards, Sebastian de Ferranti thought of "stepping down" high-voltage alternating current. De Ferranti's idea enabled the assembly line and mass production.

7 0
3 years ago
Read 2 more answers
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