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laiz [17]
1 year ago
13

PLEASE HELP AS SOON AS POSSIBLE

Mathematics
1 answer:
goldfiish [28.3K]1 year ago
4 0

Answer:

6.9

Step-by-step explanation:

I took the USATP hope it helps

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20x^2-30=4x solve for x
ankoles [38]

Answer:

x=1.3288 or -1.1288

Step-by-step explanation:

Given 20x^{2}-30=4x

    Subtract 4x from both sides

         20x^{2}-4x-30=0

Since we can factor out 2 from whole equation, let's factor out 2.

         2(10x^{2}-2x-15)=0

Divide with 2 on both sides

         10x^{2}-2x-15=0

We got the quadratic equation, we can solve for x using quadratic formula.

x=\frac{-b\pm\sqrt{b^{2}-4ac} } {2a}

x=\frac{2\pm\sqrt{2^{2}-4X10X(-15)} } {2X10}

x=\frac{2\pm\sqrt{604} }{20}

x=\frac{2\pm2\sqrt{151}}{20}

x=1.3288or-1.1288


8 0
3 years ago
Read 2 more answers
W + 4 = (-6) This is an algebra question and I don't get the negative
Arada [10]

Answer:

w = -10

Step-by-step explanation:

w + 4 = (-6)

Subtract 4 from each side

w+4-4 = -6-4

w = -10

7 0
2 years ago
Read 2 more answers
14. Sara is reading a 280 page book. If she has read 174 pages, what percent of the book
alex41 [277]
280-174=106
106/280=.3785=37.85%
4 0
2 years ago
Read 2 more answers
The coordinates of parallelogram UVWZ are U(a, 0), W(c - a, b), and Z(c, 0). Find the coordinates of V without using any new var
UkoKoshka [18]
Check the picture below.

so, as you can see, the UV segment is parallel to ZW, and therefore, they're the same slope, hmmm wait just a second, what is the slope of ZW anyway?

\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
%  (a,b)
&Z&(~ c &,& 0~) 
%  (c,d)
&W&(~ c-a &,& b~)
\end{array}
\\\\\\
% slope  = m
slope =  m\implies 
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{b-0}{(c-a)-c}\implies \cfrac{b}{-a}

since now we know the ZW slope, we also know what is the slope for UV, thus,

\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
%  (a,b)
&U&(~ a &,& 0~) 
%  (c,d)
&V&(~ x &,& y~)
\end{array}
\\\\\\
% slope  = m
slope =  m\implies 
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{y-0}{x-a}~~=~~\stackrel{ZW's~slope}{\cfrac{b}{-a}}
\\\\\\
\begin{cases}
y-0=b\implies \boxed{y=b}\\
-----------\\
x-a=-a\implies \boxed{x=0}
\end{cases}\qquad \qquad V~(0,b)

8 0
3 years ago
A circle with radius of 2 cm sits inside a circle with radius of 4 cm.
Andru [333]

Answer:

the shaded region is 12

Step-by-step explanation:

Subtract the area of 4 pie r squared from the area of 2 pie r squared

3 0
3 years ago
Read 2 more answers
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