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3 years ago

A 180 ft long board is cut into 3 pieces. The second piece of

Mathematics

2 answers:

blagie [28]3 years ago

6 0

Answer:

20 feet

Step-by-step explanation:

1st piece = x

2nd piece = 2x

3rd piece = 6x

x+2x+6x=180

9x=180

x=20

so the first piece is 20 feet, the second is 40, and the third is 120.

Taya2010 [7]3 years ago

6 0

Answer:

120

Step-by-step explanation:

multiplicas:

20 por 2, eso te da 40 lo que es la segunda pieza, finalmente multiplica 20 por 6 lo cual te da 120, sumas esas 3 cifras: 20+40+120 y tendras como resultado 180, denada uwu

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NEED HELP WITH PART B

Sergeu [11.5K]

Answer:

y = -20x + 100

Step-by-step explanation:

As per your requirement For Part B, the solution is

The equation in slope-intercept form to model the relations is below:-

To reach 2 points on the graph the line passes through

lets use p1(0, 100), p2(1, 80)

now we will compute the slope:

$m = \frac{(y2 - y1)}{(x2 - x1)}$

$m = \frac{(80 - 100)}{(1 - 0)}$

= -20

and now use line equation in form point-slope:

y - y1 = m(x - x1)

y - 100 = -20(x - 0)

y = -20x + 100

6 0

3 years ago

What are the possible values of x if (4x – 5)2 = 49?

STatiana [176]

2(4x - 5) = 49
8x - 10 = 49
8x - 10 + 10 = 49 + 10
8x = 59
8x/8 = 59/8
x = 7.375

3 0

3 years ago

. Asking 100 students at a large university for their opinions on campus life is an example of measuring a _____.

Slav-nsk [51]

Answer:

Step-by-step explanation:

I am assuming that the university has much more than 100 students so 100 people is just a small sample.

3 0

3 years ago

Read 2 more answers

Let f(x) = 5x + 4 and g(a) = a2 − 4a + 4 2 . Find the function value. g(−2)

natta225 [31]

Answer: 54

Step-by-step explanation:

replace "a" with "-2" in the g-equation

g(a) = a² - 4a + 42

g(-2) = (-2)² - 4(-2) + 42

= 4 + 8 + 42

= 54

7 0

3 years ago

What is the solution of the equation over the complex numbers

denis-greek [22]

Answer:

$2i\sqrt{3}$

$-2i\sqrt{3}$

Step-by-step explanation:

$x^2 + 12$

First set the equation to 0

$x^2 + 12$

$x^2 + 12 = 0$

Second, get the 12 on the right side of the equal sign by adding a -12 to each side

$x^2 + 12 = 0$

$x^2 + 12 + (-12) = 0 -12$

$x^2 = -12$

Square root both sides of the equal sign.

$x^2 = -12$

$\sqrt{x^2} = \sqrt{-12}$

Take the square root on left sides of the equal sign.

$\sqrt{x^2} = \sqrt{-12}$

$x = \sqrt{-12}$

Take the square root on the right side of the equal sign. Remember $\sqrt{-1} = i$

$x = \sqrt{-12}$

$x = \sqrt{4}*\sqrt{-1}\sqrt{3}}$

$x = 2i\sqrt{3}$

AND

$x = -2i\sqrt{3}$

8 0

3 years ago