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3 years ago

Explain why it works to break apart a number by place values to multiply

Mathematics

1 answer:

Furkat [3]3 years ago

7 0

It helps because it tells me what I need to multiply

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Hi, i need to calculate roots x1 and x2 using the vieta theorem, can anyone help me? I have found the answer for x1 and x2, its

Mnenie [13.5K]

Answer:

Solution given:

-2x²+7x-6=0

2x²-7x+6=0

Comparing above equation with ax²+bx+c

we get

a=2

b=-7

c=6

By using Vieta's theorem

X1+X2= $\frac{-b}{a}$ = $\frac{7}{2}$

again

X1X2= $\frac{c}{a}$ = $\frac{6}{2}$ =3

7 0

3 years ago

I need help from people that know the answer is right!!PLEASE HELP ASAP

nikdorinn [45]

Radius=r=3ft

Its a sphere

$\boxed{\sf Volume=\dfrac{4}{3}πr^3}$

$\\ \sf\longmapsto Volume=\dfrac{4}{3}\times\dfrac{22}{7}\times 3^3$

$\\ \sf\longmapsto Volume=\dfrac{4\times 22}{7}\times 9$

$\\ \sf\longmapsto Volume=113.1ft^3$

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3 years ago

What is the side length of the square A = 81 m^2

8_murik_8 [283]

Answer: 9

Step-by-step explanation: To get the area of a square you do length times width. It has to be the same number so the square root of 81 is 9. Therefore your answer is 9.

6 0

3 years ago

Washington is 44 mi south of Lawrence. Midland is 63 mi east of Lawrence. How far apart are Washington and Midland? Round your a

IgorLugansk [536]

use the pythagorean theorem...

77 miles

6 0

4 years ago

A right triangle in which one acute angle is a reference angle for a 115 degree angle in standard position intersects the unit c

Ratling [72]

Answer:

$\cos (115\degree)=-0.423$

Step-by-step explanation:

The parametric equations of a circle is

$x=r\cos \theta$ and $y=r\sin \theta$

The radius of the unit circle is 1 unit.

This implies that any point on the unit circle is represented by:

$x=\cos \theta$ and $y=\sin \theta$

where $\theta$ is the angle in standard position,

From the question, the given angle in standard position is $115\degree$ .

This angle intersects the unit circle at $x=-0.423$

But $x=\cos \theta$

We substitute $\theta=115\degree$ and $x=-0.423$

This implies that: $\cos (115\degree)=-0.423$

6 0

3 years ago