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3 years ago

2(2x - 5) + 6 = 20solve for xplease show stepsx=_

Mathematics

2 answers:

Sloan [31]3 years ago

7 0

Answer:

Step-by-step explanation:

The first step is to distribute.

2(2x) 2(5)

this will give you 4x and 10.

4x +10 +6=20

then, you add 10 and 6, which will give you 16

4x +16=20

next, you subtract 16 on both sides, which will leave you with 4x =4

x=1

nevsk [136]3 years ago

4 0

Answer:

x = 6.

Step-by-step explanation:

2(2x - 5) + 6 = 20

4x - 10 + 6 = 20

4x - 4 = 20

4x = 20 + 4

4x = 24

x = 24/4

x = 6.

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3 years ago

A rectangular box has the dimensions shown in the diagram. The volume of the box is given by the function V(x) = x3 – 4x, where

marta [7]

Answer:

$Height =3$

Step-by-step explanation:

Given

$Length = x + 2$

$Width = x - 2$

$Height = x$

$Volume = 15$

Required

Find the height

The volume is calculated as thus:

$Volume = Length * Width * Height$

This gives

$15 = (x + 2) * (x - 2) * x$

Apply difference of two squares

$15 =(x^2 - 4 ) * x$

$15 = x^3 - 4x$

Subtract 15 from both sides

$x^3 - 4x - 15 = 0$

Using a calculator to factorize, we have:

$(x-3)(x^2+3x+5) = 0$

Split

$x - 3 = 0$ or $x^2 + 3x + 5 = 0$

$x = 3$ or $x^2 + 3x + 5 = 0$

x has complex roots for $x^2 + 3x + 5 = 0$

Hence:

$x = 3$

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$Height = x$

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3 0

3 years ago

What is the greatest common factor (GCF) of 36 and 42

Goryan [66]

Answer:

36: 1,2,3,4,6,9,12,18,36

42: 1,2,3,6,7,14,21,42

gcf is 6

8 0

3 years ago

Read 2 more answers

If triangle RST and triangle XYZ are similar, which of these equations must be true?

Delicious77 [7]

Answer: A

Step-by-step explanation:

If they are similar, that means the proportions for corresponding sides will be the same.

I personally ignore the picture and use the labels of "triangle RST and triangle XYZ" that the problem gives because the XYZ picture is not lined up with the similarity it has with RST.

(A) says that side ST is corresponding with side YZ,

[] Triangle RST and triangle XYZ

-> Correct

(A) also says that side RT is corresponding with size XZ,

[] Triangle RST and triangle XYZ

-> Correct

This means that option A is the correct answer.

4 0

2 years ago

2(2x - 5) + 6 = 20solve for xplease show stepsx=_​

2(2x - 5) + 6 = 20solve for xplease show stepsx=_