3 years ago

What is the value of the expression 9x^2-12x+4 when x=3

Mathematics

1 answer:

Inessa05 [86]3 years ago

4 0

Answer:

Step-by-step explanation:

When x=3,

= 9x^2-12x+4

= 9(3)^2-12(3)+4

=81-36+4

=49

You might be interested in

BEEEP Hhh, Math sucks ;-;

Alex

Answer:

A is the answer.

Step-by-step explanation:

C=2πr

/2π /2π

C/2π=r

8 0

3 years ago

Read 2 more answers

Which graph represents the solution set of the inequality x+226?

vekshin1

Answer:1

Step-by-step explanation:

4 0

3 years ago

What is the area of a sector with a central angle of 108 degrees and a diameter of 21.2 cm?

Rasek [7]

Answer:

$105.84\ cm^2$

Step-by-step explanation:

step 1

Find the area of the circle

The area of the circle is

$A=\pi r^{2}$

we have

$r=21.2/2=10.6\ cm$ ----> the radius is half the diameter

substitute

$A=\pi (10.6)^{2}$

$A=112.36\pi\ cm^2$

step 2

Find the area of a sector

Remember that

The area of the circle subtends a central angle of 360 degrees

using proportion

Find out the area of a sector with a central angle of 108 degrees

$\frac{112.36\pi}{360^o}=\frac{x}{108^o}\\\\x=112.36\pi(108)/360\\\\x=33.708\pi\ cm^2$

assume

$\pi=3.14$

substitute

$33.708(3.14)=105.84\ cm^2$

7 0

3 years ago

A sphere has a radius of 2 inches. What is the approximate volume of half of the sphere?

Schach [20]

Answer:

1 inch

Step-by-step explanation:

4 0

2 years ago

Can someone answer This, please?

V125BC [204]

I am pretty sure it's the second sentence.

5 0

3 years ago