Let's say that number is hmmm "a"

now.. twice "a" is 2*a or 2a
4 less than that is " 2a - 4"

now, the product of those two fellows is 286, well ok

a( 2a - 4) = 286

thus

$\bf a(2a-4)=286\implies 2a^2-4a^2=286\implies a^2-2a^2=143
\\\\\\
a^2-2a^2-143=0\implies (a-13)(a+11)=0
\\\\\\
\begin{cases}
a-13=0\implies &a=13\\
a+11=0\implies &\boxed{a=-11}
\end{cases}$

5 0

3 years ago

jody has a 5-pound bag of potatoes he uses 4/5 of the bag to make potato salad. how.many pounds of potatoes does jody use for th

sveticcg [70]

She used 4 because 4/5 translates to 4 out of 5

5 0

3 years ago

Read 2 more answers

Randomly distributing 45 pencils and 35 markers to his students. what is the probability that the first item he hands out will

Dominik [7]

If he hands out pencils will be 45/80 =
If he hands out markers will be 35/80

3 0

3 years ago