1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Readme [11.4K]
3 years ago
12

Given:3x-4=8 prove x=4

Mathematics
1 answer:
anastassius [24]3 years ago
3 0

Hi!

Okay, so to prove that x = 4, all you have to do is insert 4 into the equation by replacing x with 4.

3x-4=8

3(4)-4=8

Now solve:

12-4=8

8=8

This is true, so x does equal 4.

You might be interested in
Jbcjkbcjkbdkcvdc ndbljbvv1
Elina [12.6K]
Jdkdhkshsoshsisihksjdodid
8 0
3 years ago
A penguin walks 15 feet in 9 seconds.
shtirl [24]

Answer:

12 seconds.

Step-by-step explanation:

If you put it like 15/9 = 20/x, then cross multiply and divide you do 9 times 20 you get 180, then you divide 180 by 15 and you get 12. Hope this helps!

4 0
3 years ago
Read 2 more answers
The length of a rectangle is 5 more than the width. The area is 126 square feet. Find the length and width of the rectangle.
solmaris [256]

The length of the rectangle is 14 feet and the width of the rectangle is 9 feet.

The length of a rectangle is 5 more than the width. The area is 126 square feet.

We need to find the length and width of the rectangle.

<h3>What is the area of a rectangle?</h3>

The area of a rectangle is calculated by multiplying the rectangle's length by its width.

Let the width of the rectangle be x, then the length of the rectangle be x+5.

We know that the area of the rectangle = Length×Width

Now, the area of the rectangle = (x+5)×x=126 square feet.

⇒x^{2}+5x-126=0

⇒x^{2}+14x-9x-126=0

⇒x(x+14)-9(x+14)=0

⇒x=-14, x=9.

Since length cannot be a negative integer.

So, Width=9 feet and Length=9+5=14 feet.

Hence, the length of the rectangle is 14 feet and the width of the rectangle is 9 feet.

To know more about the area of the rectangle visit:

brainly.com/question/20693059

#SPJ1

3 0
2 years ago
What is 3% equal to?
Vsevolod [243]

Answer:

0.03 or 3/100

6 0
3 years ago
All fractions between 0 and 1/4
AVprozaik [17]
Such fractions are infinitely many, but will write you a few:
We extend a fraction of ten:
\frac{1*10}{4*10}=\frac{10}{40}
Our expressions must be in the range of 0, and \frac{10}{40}
\frac{1}{40}

\frac{2}{40}

\frac{3}{40}

\frac{4}{40}

\frac{5}{40}

\frac{6}{40}

\frac{7}{40}

\frac{8}{40}
<span>
\frac{9}{40}</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • What would the average change be?
    12·2 answers
  • Simplify 3 1/2 x 3 1/2
    15·1 answer
  • Find the circumference of this figure. Show your calculations.
    5·1 answer
  • What is the inequality of 6x-4&lt;8?
    12·1 answer
  • A company is offering a job with a salary of $30,000 for the first year and a 2.3% raise year year after that. I know the sequen
    5·1 answer
  • Consider the sequence -3, -7,-11, -15...
    6·1 answer
  • PLS HELP! Which transformation could take figure P to figure Q?
    5·2 answers
  • The circumference of a circle is 22π in. What is the area, in square inches? Express your answer in terms of π
    12·1 answer
  • Write the numbers three hundred and fifty-four thousand, two hundred and ten in figures (354,210).
    9·1 answer
  • Ben gets 14/20 in his Geography test. What percentage is this?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!