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3 years ago

7

What is the meaning of algebra and expressions

2 answers:

iren [92.7K]3 years ago

4 0

In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations (addition, subtraction, multiplication, division and exponentiation by an exponent that is a rational number). For example, 3x2 − 2xy + c is an algebraic expressio

Scrat [10]3 years ago

3 0

Answer:

Algebra is a branch of mathematics that substitutes letters for numbers. Algebra is about finding the unknown or putting real-life variables into equations and then solving them. Algebra can include real and complex numbers, matrices, and vectors. An algebraic equation represents a scale where what is done on one side of the scale is also done to the other and numbers act as constants.

Expressions is a Numbers, symbols and operators (such as + and ×) grouped together that show the value of something.

Examples:

• 2 + 3 is an expression

• 3 − x/2 is also an expression

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sammy [17]

Answer:

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Step-by-step explanation:

use pemdas

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3 years ago

Read 2 more answers

Which of the following is an extraneous solution of (45 minus 3 x) Superscript one-half Baseline = x minus 9?

STALIN [3.7K]

The extraneous solution of the given radical equation is x = 3

<h3>Finding the extraneous solution:</h3>

Here we have the radical equation:

$\sqrt{45 - 3x} = x - 9$

We want to get the extraneous solution, to get it, we first need to square both sides of the equation, so we get:

$(\sqrt{45 - 3x} )^2 = (x - 9)^2\\\\45 - 3x = x^2 - 18x + 81$

Now we got a quadratic equation, we can rewrite it as:

$x^2 - 18x + 81 + 3x - 45 = 0\\\\x^2 - 15x + 36 = 0$

To solve this we use Bhaskara's formula, we will get:

$x = \frac{15 \pm \sqrt{(-15)^2 - 4*1*36} }{2*1} \\\\x = \frac{15 \pm 9}{2}$

Then the two solutions are:

x = (15 + 9)/2 = 12

x = (15 - 9)/2 = 3

<h3>Which one is the extraneous solution?</h3>

Let's evaluate both solutions in our original equation and let's see which is the one that does not work:

for x = 12 we have:

$\sqrt{45 - 3*12} = 12 - 9\\3 = 3$

This is true.

For x = 3 we have:

$\sqrt{45 - 3*3} = 3 - 9\\\\6 = -6$

This is false, so the extraneous solution is x = 3.

If you want to learn more about extraneous solutions, you can read:

brainly.com/question/2959656

4 0

2 years ago

A tent has an opening 8ft. Wide and a height of 5ft. What is the area of the opening?

Mariana [72]

Answer:

20 ft?

Step-by-step explanation:

7 0

4 years ago

HELP ASAP ITS FOR A TEST!

Setler [38]

Answer: reflection on the x access then translation down

Step-by-step explanation:

You can see the reflection because the x axis did not change and then the translation down because it was meant to be (1,-1) but its (1,-2)

5 0

2 years ago

Four students equally share 1\4 poud of peanuts.How of a pound of peanuts did each student get?

posledela

Answer:1/16

Step-by-step explanation:1/4= .25

Divide .25 by 4( for the four students) = .0625

.0625 is equivalent to 1/16

4 0

3 years ago