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3 years ago

40 POINTS FOR A TIME-CONSUMING MATH ASSIGNMENT

Mathematics

1 answer:

WITCHER [35]3 years ago

4 0

Answer:

It's working now?? My computer is very old and difficult to use sorry lol

The file is attached as a PDF. Brainly won't let me include links in an answer so I can't put the Google Drive link too :(

Good luck!!

Download pdf

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Use the Pythagorean Theorem to find an approximate value of x

kozerog [31]

Answer:

Step-by-step explanation:

Hypotenuse² =base² + altitude²

(3x + 4)² = (2x + 1)² + (3x)²

{Use (a+b)² = a² + 2ab + b²}

(3x)² + 2*3x+4 + 4² = (2x)² + 2*2x*1 + 1² + 9x²

9x² + 24x + 16 = 4x² + 4x + 1 + 9x²

9x² + 24x + 16 = 13x² + 4x + 1

0 = 13x² + 4x + 1 - 9x² - 24x - 16

13x² - 9x² + 4x - 24x +1 - 16 = 0

4x² - 20x - 15 = 0

a = 4 ; b =-20 ; c = -15

D = b² - 4ac = (-20)² - 4*4*(-15) = 400 + 240 = 640

√D = √640 = 25.30

$x=\dfrac{-b+\sqrt{D}}{2a} \ ; \ x=\dfrac{-b-\sqrt{D}}{2a}\\\\\\x=\dfrac{20+25.30}{2*4} \ ; \ x=\dfrac{20-25.30}{2*4}\\\\\\x=\dfrac{45.30}{8} \ ; \ x =\dfrac{-5.30}{8}\\\\$

x = 5 .66 ; x = -0.66

Ignore x = -0.66 as length of a side cannot be negative

Answer : x = 5.66

7 0

3 years ago

Homework helpp!! which is bigger 2.25 or 0.04?

Leokris [45]

2.25 = 225 / 100 ;
0.04 = 4 / 100 ;
But, 225 > 4 ; then, 225 / 100 > 4 / 100 ;
Bigger is 2.25 !

6 0

4 years ago

What does 11.4cm x 7.00cm x 8.60cm mean?

Gnoma [55]

What does this mean?
it means times them all togather.

6 0

3 years ago

What is the slope of the line represented by the equation y = - 1/2x + 1/4

snow_lady [41]

Answer:

The slope is -1/2

Step-by-step explanation:

-1/2 is a negative slope. Down 1 to the right 2

7 0

4 years ago

Vector makes three different purchases at three different stores one afternoon. Each time he spends 1/3 of the money he is carry

liubo4ka [24]

Answer:

The money which vector have is $54

Step-by-step explanation:

Given as:

Vector makes three different purchases at three different stores one afternoon. Each time he spends 1/3 of the money he is carrying.

At The end of day vector have money left = $16

Let the money does Vector have at start = $x

<u>Now, According to question</u>

At The first store he had money with him = $x

So, After purchased of item, The money left with him = $x - $ $\dfrac{x}{3}$ = $ $\dfrac{2x}{3}$

At The second store he had money with him = $ $\dfrac{2x}{3}$

So, After purchased of item, The money left with him = $ $\dfrac{2x}{3}$ - $ $\dfrac{2x}{9}$ = $ $\dfrac{4x}{9}$

At The third store he had money with him = $ $\dfrac{4x}{9}$

So, After purchased of item, The money left with him = $ $\dfrac{4x}{9}$ - $ $\dfrac{4x}{27}$ = $ $\dfrac{8x}{27}$

Now, Again

∵ At The day end the money left with Vector = $16

So, $ $\dfrac{8x}{27}$ = $16

Or. 8 x = $16 × 27

∴ x = $\frac{16\times 27}{8}$

i.e x = $54

So, The money which vector have = x = $54

Hence, The money which vector have is $54 Answer

7 0

3 years ago