3 years ago

Mr. Green washed

Mathematics

2 answers:

olga_2 [115]3 years ago

7 0

Answer:

What was the original number??

Step-by-step explanation:

Effectus [21]3 years ago

6 0

The answer is 7/20 still needs to be washed. Hope this helped!! :)

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Can't figure it out!!

Zanzabum

$\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\
f(x)= \cfrac{1}{x} \qquad 
\begin{cases}
x_1=2\\
x_2=b
\end{cases}\implies \cfrac{f(b)-f(2)}{b-2}=-\cfrac{1}{10}
\\\\\\
\cfrac{\frac{1}{b}-\frac{1}{2}}{b-2}=-\cfrac{1}{10}\implies 
\cfrac{\frac{2-b}{2b}}{b-2}=-\cfrac{1}{10}\implies \cfrac{2-b}{2b}=-\cfrac{b-2}{10}
\\\\\\
$

$\bf \cfrac{2-b}{2b}=\cfrac{2-b}{10}\implies 20-10b=4b-2b^2\impliedby cross-multiplying
\\\\\\
2b^2-4b-10b+20=0\implies 2b^2-14b+20=0
\\\\\\
b^2-7b+10=0\implies 
(b-2)(b-5)=0\implies b=
\begin{cases}
\boxed{5}\\
2
\end{cases}$

8 0

2 years ago

Solve the system of equations. 2x - 4y = 10 7x - 9y = 12

drek231 [11]

2x - 4y = 10
7x - 9y = 12
_________
9x - 5y = 2

3 0

3 years ago

Read 2 more answers

Solve the system of equations by graphing. If the system has no solution or infinitely many so state.

S_A_V [24]

The systems will intersect at (1,-4), and i think the system has infinite solutions (not sure)

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