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2 years ago

How do I Simplify (4x-4)-3

Mathematics

2 answers:

____ [38]2 years ago

6 0

Answer:

4x-7

Step-by-step explanation:

(4x-4)-3

Combine like terms

4x -4-3

4x-7

sp2606 [1]2 years ago

5 0

Answer:

4x-7

Step-by-step explanation:

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What is the volume of a cone that has a radius of 4 cm and a height of 9 cm?

vodka [1.7K]

For any sort of pyramid or cone, the volume is 1/3 of the volume of a prism with the same base and height. Since the volume of a prism/cylinder is $V=Bh$ , the volume of a pyramid/cone is $V=\frac{1}3Bh$ .

In this case, our base is a circle, which has a radius of 4 cm.
The area of a circle is $A=\pi r^2$ where r is the radius.
$A=\pi (4)^2=\pi (4\times4)=16\pi=B$

We now know that our base is 16π cm.
We also know that our height is 9 cm.
Let's plug these into our volume formula.

$V=\frac{1}3\times16\pi \times9$

Use 3.14 to approximate pi as the question states. 16 × 3.14 = 50.24.

$V\approx\frac{1}3\times50.24\times9$

We could punch all of that into our calculator to get the same answer, but since 1/3 of 9 is clearly 3, let's just go with that.

$V\approx3\times50.24$

$\boxed{V\approx150.72\ cm^3}$

8 0

3 years ago

Read 2 more answers

I WILL GIVE BRAIN THING

Romashka-Z-Leto [24]

Answer:

1) Combine the x tiles to get: $\mathbf{4x}$

2) Combine integer tiles to get: 3

3) The equivalent function is: $\mathbf{4x+3}$

4) If we Substitute any value of x both expressions will be equivalent

Step-by-step explanation:

We are given expression: $x+x+x+x++4-1\\$

We need to complete following statements.

1) Combine the x tiles to get:

$x+x+x+x\\=4x$

Combine the x tiles to get: $\mathbf{4x}$

2) Combine integer tiles to get:

$+4-1\\=3$

Combine integer tiles to get: 3

3) The equivalent function is:

$x+x+x+x++4-1\\\\4x+3$

The equivalent function is: $\mathbf{4x+3}$

4) If we Substitute any value of x both expressions will be equivalent

Verifying:

$x+x+x+x+4-1=4x+3\\Let\: x = 1\\1+1+1+1+4-1=4(1)+3\\4+4-1=4+3\\7=7$

So, Both expressions are equivalent.

8 0

3 years ago

Read 2 more answers

Can someone solve the system of equations?

kogti [31]

Y=x^2-5

y=2x-5
y+5=2x
x=(y+5)/2

y=((y+5)/2)^2-5
y=(y^2+10y+25)/4-5
4y=y^2+10y+25-20
0=y^2+6y+5
0=(y+5)(y+1)
y= -5 or -1

y=2x-5 (y= -5 doesn't work for this one so use -1)
-1=2x-5
2x=4
x=2

Using these answers, you can choose answer D with reasonable certainty.

5 0

3 years ago

Radius of the circle is 20cm. there are two chords of lengths.

Vaselesa [24]

9514 1404 393

Answer:

12 cm

Step-by-step explanation:

The distance to the chord is the median of an isosceles right triangle with hypotenuse 20 and leg 16. This 5:4 ratio suggests the other leg of that right triangle would make the ratios 3 : 4 : 5, so is 12.

The chords are 12 cm from the center.

_____

You can, of course, use the Pythagorean theorem. If c is half the chord length and d is the distance to the chord, you have ...

c² + d² = r²

16² + d² = 20²

d² = 400 -256 = 144

d = √144 = 12 . . . . . cm

4 0

3 years ago

What is an algebraic expression for the word phrase?<br> the difference of a number r and 3

Ostrovityanka [42]

Answer:

r - 3

Step-by-step explanation:

The word "difference" means that it's a subtraction problem

so the difference between r and 3 is r - 3

8 0

4 years ago