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2 years ago

An expression that uses variables to state a rule is a ______

Mathematics

2 answers:

nikdorinn [45]2 years ago

7 0

<u>Formula</u>

<em>An expression that uses variables to state a rule is a </em><u><em>formula</em></u>

<h2>Explanation:</h2>

An expression that uses variables to state a rule is a formula. It's important to know that formulas uses the equals sign (=) and includes two or more variables. Formulas gives us information that we express symbolically. For example, the well known formula for the volume of a sphere is defined as:

$V=\frac{4}{3} \pi r^3 \\ \\ \\ Where: \\ \\ V:Volume \ of \ the \ sphere \\ \\ r:Radius \ of \ the \ sphere$

So in this formula we have a relationship between the volume of a sphere and its radius, so if we have information about the radius of it we can easily calculate the volume of it.

<h2>Learn more:</h2>

Volume of prism: brainly.com/question/12501166

#LearnWithBrainly

Sati [7]2 years ago

5 0

Answer:

I mean formula is normally just variables so ye

Step-by-step explanation:

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Really need help what’s the answer

Agata [3.3K]

Answer:

1.5

Step-by-step explanation:

The slope is 1.5. If you look at 3 and 4, you can see it increases by 1.5.

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3 years ago

A smart phone regularly sells for $180.00 but is on sale for 30% off. What is the amount of the discount?

pantera1 [17]

Answer:

$54

Step-by-step explanation:

The amount of the discount can be found by multiplying 180 by 0.3 which is 54.

If you also need to know the new total it would be $126 because

180 - 54 = 126

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3 years ago

Hunter placed 2 red, 3 blue, 1 yellow, 8 black, and 7 white straws into a bag.

Sphinxa [80]

7/21 or 1/3rd, it's just a ratio of white to all, there's 7 white straws and 21 in all, then you can simplify it down to 1/3rd.

8 0

2 years ago

NEED HELP ASAP 30 POINTS

klemol [59]

30 is the answer. You do 10X 3 which is 30- 2 which is 28 and 28 to the nearest 10th is 30

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2 years ago

Solving these quadratics for x using complete the square 3x^2-4x-1=0. Show your work.

UkoKoshka [18]

Answer: x = (sqrt(7) + 2)/3 and
x = ( – sqrt(7) + 2)/3

Explanation:

3x^2 - 4x - 1 = 0

Divide both sides by 3:

3x^2/3 - 4/3x - 1/3 = 0/3
x^2 - 4/3x - 1/3 = 0
x^2 - 4/3x = 1/3
x^2 - 4/3x + (2/3)^2 = 1/3 + (2/3)^2
(x - 2/3)^2 = 1/3 + 4/9
(x - 2/3)^2 = 7/9

Sqrt both sides:

x - 2/3 = sqrt (7/9)
x - 2/3 = |sqrt(7)/3|

Set x -2/3 = sqrt(7)/3

=> x = (sqrt(7) + 2)/3

Set x - 2/3 = - sqrt(7)/3

=> x = ( - sqrt(7) + 2)/3

6 0

2 years ago