Simplify 10a^2+9ab-40b^2

Mathematics

1 answer:

Rus_ich [418]3 years ago

3 0

Answer:

I installed the solution. good work

You might be interested in

How do you write (6)^-2 without exponents?

m_a_m_a [10]

(6)^-2 Is equivalent to 1/36

5 0

3 years ago

Read 2 more answers

PLEASE HELLP ME! I would appreciate if you can!!

S_A_V [24]

Answer:

(2) A

Step-by-step explanation: easy Math

3 0

3 years ago

What is 72.1 repeating as a fraction? Simplified.

Viefleur [7K]

The answer is quite simple after looking at it. 0.1 is a tenth. 72 is a whole number, so you would have 72 1/10. 1/10 is a tenth and 72 is still the whole number.

6 0

3 years ago

The figure shows the dimensions of a backyard

Ulleksa [173]

Answer:

570yd^2

step by step:

Split the backyard into 2 different rectangles and add the areas together. I did 8x30 and 15x22.

8 0

2 years ago

Read 2 more answers

a plane flying with the wind travels 630 mi in 1.5hrs. Flying against the wind , the plane travels 1120 mi in 4hrs. Find the rat

Flauer [41]

$\bf \begin{cases}
r=\textit{rate of the plane}\\
w=\textit{rate of the wind}\\
\end{cases}
\\\\

\begin{array}{ccccllll}
&distance&rate&time(hrs)\\
&\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\\
\textit{with wind}&630&r+w&1\frac{1}{2}\\
\textit{against wind}&1120&r-w&4
\end{array}
$

$\bf thus \begin{cases}
630=(r+w)1\frac{1}{2}\to 630=(r+w)\frac{3}{2}
\\\\
1120=(r-w)4\\
--------------\\
630=(r+w)\frac{3}{2}\implies 630\cdot \frac{2}{3}=r+w\\
420=r+w\implies \boxed{420-w}=r\\
--------------\\
thus\\
--------------\\
1120=(r-w)4\implies 1120=4r-4w
\\\\
1120=4(\boxed{420-w})-4w
\end{cases}
$

solve for "w", to find the wind's speed rate,

so hmmm what's the plane's rate? well 420 - w = r :)

5 0

2 years ago