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3 years ago

Complete the table of values for y=x^2-4x

Mathematics

2 answers:

maksim [4K]3 years ago

6 0

(-1, 5)
(0,0)
(1, -3)
(2, -4)
(3, -3)
(4, 0)
(5, 5)

Zolol [24]3 years ago

3 0

Answer:

y =(5,0,-3,-4,-3,0,5)

Step-by-step explanation:

To get y you have to replace the different number of x in the equation

For example,

To x=-1

y=x^2-4x

y=(-1)2-4*(-1)=

y=5

to x=0

y=x^2-4x

y=0^2-4*0

y=0

The table will be:

x y

-1 5

0 0

1 -3

2 -4

3 -3

4 0

5 5

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Step-by-step explanation:

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3 years ago

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2 years ago

1.) A 20° sector in a circle has an area of 21.5π yd².

a_sh-v [17]

Part 1) A 20° sector in a circle has an area of 21.5π yd².

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we know that

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so by proportion

$\frac{21.5\pi }{20} =\frac{x}{360} \\ \\ x*20=360*21.5\pi \\ \\x=(360*21.5*3.14)/20\\ \\x= 1,215.18\ yd^{2}$

therefore

the answer part 1) is

The area of the circle is $1,215.18\ yd^{2}$

Part 2) What is the area of a sector with a central angle of 3π/5 radians and a diameter of 21.2 cm?

we know that

the area of the circle is equal to

$A=\pi r^{2}$

where

r is the radius of the circle

in this problem we have

$Diameter=21.2\ cm\\ r=Diameter/2\\r=21.2/2\\r= 10.6\ cm$

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$A=\pi r^{2}$

$A=\pi*10.6^{2}$

$A=352.8104\ cm^{2}$

Find the area of the sector

we know that the area of the circle represent a sector of $2\pi$ radians

by proportion

$\frac{352.8104}{2\pi }=\frac{x}{(3\pi/5)} \\\\x*2\pi=(3\pi*352.8104)/5\\ \\x= 105.84\ cm^{2}$

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3 years ago

1/4 of a number minus 8 is -23

Bas_tet [7]

Answer:

I have solved it u can have a look.

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3 years ago

Prime factor tree of 385

timama [110]

11*5*7

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