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3 years ago

If x=3 then x^2=9. true or false?

Mathematics

2 answers:

rewona [7]3 years ago

7 0

Answer:

if you mean x times 2 equals nine then false if you mean x to the power of two then true.

Step-by-step explanation:

MA_775_DIABLO [31]3 years ago

5 0

Answer:

True

Step-by-step explanation:

x^2 = 9

if 3 is x then it is ???

3^2 = 3 x 3 = 9

if 3 is x then it is true

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Experimentally verify sum of three angles of an triangle is 180⁰.

svetlana [45]

Draw line a through points A and B. Draw line b through point C and parallel to line a.

Since lines a and b are parallel, <)BAC = <)B'CA and <)ABC = <)BCA'.

It is obvious that <)B'CA + <)ACB + <)BCA' = 180 degrees.

Thus <)ABC + <)BCA + <)CAB = 180 degrees.

Lemma

If ABCD is a quadrilateral and <)CAB = <)DCA then AB and DC are parallel.

Proof

Assume to the contrary that AB and DC are not parallel.

Draw a line trough A and B and draw a line trough D and C.

These lines are not parallel so they cross at one point. Call this point E.

Notice that <)AEC is greater than 0.

Since <)CAB = <)DCA, <)CAE + <)ACE = 180 degrees.

Hence <)AEC + <)CAE + <)ACE is greater than 180 degrees.

Contradiction. This completes the proof.

Definition

Two Triangles ABC and A'B'C' are congruent if and only if

|AB| = |A'B'|, |AC| = |A'C'|, |BC| = |B'C'| and,

<)ABC = <)A'B'C', <)BCA = <)B'C'A', <)CAB = <)C'A'B'.

4 0

3 years ago

What is 8 Divided by 231 to the nearest thousandth

Mkey [24]

Answer:

0.346

Step-by-step explanation:

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3 0

2 years ago

Read 2 more answers

HELP MEEEEEE PLESEEE

lara [203]

Answer:

648 cubic centimeters

Step-by-step explanation:

6×9×12=648

5 0

3 years ago

Read 2 more answers

Every positive integer is smaller than every negative integer true or false

Evgen [1.6K]

The answer is false. Good luck with other questions!

5 0

3 years ago

Does (2,0) work as a solution to the systems of equations to lines 3x+y=6 and 3x-y=6

fenix001 [56]

Answer:

Yes

Step-by-step explanation:

To see if (2,0) works as a solution to the systems of equations, we plug in the values of x and y and simplify. If the results are equal, then (2,0) is a solution.

3x + y = 6:

$3(2) + 0 = 6$
$6 + 0 = 6$
$6 = 6$
(2,0) is a solution to this equation.

3x - y = 6:

$3(2) - 0 = 6$
$6 - 0 = 6$
$6 = 6$
(2,0) is a solution to this equation.

Therefore, the answer is yes, it does work as a solution.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

7 0

3 years ago