anonymous
  • anonymous
qUESTION?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
your sequence, is an arithmetic sequence, whose constant is: -42-(-38)=-38-(-34)=-4
Michele_Laino
  • Michele_Laino
so we can write the general formula of the n-th term as below: \[{a_n} = {a_1} + \left( {n - 1} \right)d\] where a1 is the first term and d=-4

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More answers

anonymous
  • anonymous
its c
anonymous
  • anonymous
right?
Michele_Laino
  • Michele_Laino
now, if we set n=10, we can write this: \[\begin{gathered} - 34 = {a_1} + 9 \times \left( { - 4} \right) \hfill \\ \hfill \\ - 34 = {a_1} - 36 \hfill \\ \end{gathered} \] what is a1?
anonymous
  • anonymous
2?
Michele_Laino
  • Michele_Laino
that's right!
Michele_Laino
  • Michele_Laino
by definition, the second term is: \[\begin{gathered} {a_2} = {a_1} + d \hfill \\ {a_2} = 2 + \left( { - 4} \right) \hfill \\ \end{gathered} \] what is a2?
anonymous
  • anonymous
-2?
Michele_Laino
  • Michele_Laino
that's right! so, what is the right option?
anonymous
  • anonymous
B!
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
thankkk youuu!!
Michele_Laino
  • Michele_Laino
:)
anonymous
  • anonymous
could you help me with 2 more please? @Michele_Laino
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
first question: the equation of your line is: \[\Large \frac{x}{{ - 4}} + \frac{y}{1} = 1\]
anonymous
  • anonymous
I'm thinking B
Michele_Laino
  • Michele_Laino
we have to rewrite that equation in this form: ax+by=c what do you get?
anonymous
  • anonymous
-4x + 1y =1?
Michele_Laino
  • Michele_Laino
I got this: \[ - x + 4y = 4\]
anonymous
  • anonymous
ill go with what you have since your more experienced
Michele_Laino
  • Michele_Laino
it is a simple computation, if I multiply both sides by 4, I get this: \[\Large 4 \times \left( {\frac{x}{{ - 4}} + \frac{y}{1}} \right) = 4 \times 1\] please simplify
anonymous
  • anonymous
do i graph what you got?
Michele_Laino
  • Michele_Laino
our points, namely the shaded region, is represented by the subsequent inequality: ax+by>c
Michele_Laino
  • Michele_Laino
so, what is that inequality in our case?
anonymous
  • anonymous
b??
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
OMGGG THANK YOUUU!! can you help me with the second one too pls?!
Michele_Laino
  • Michele_Laino
ok!
anonymous
  • anonymous
wait
anonymous
  • anonymous
wrong attachment!
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
second question: If i sum, side by side, the first and the second equation together, I get this: \[\Large \left( {x + 3y} \right) + \left( {7x - 8y} \right) = 5 + 6\] please simplify, what do you get?
anonymous
  • anonymous
8x -5y= 11
Michele_Laino
  • Michele_Laino
that's right! so what is the right option?
anonymous
  • anonymous
B
anonymous
  • anonymous
right?
Michele_Laino
  • Michele_Laino
right!
anonymous
  • anonymous
THANK. YOU. SO. MUCHHH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Michele_Laino
  • Michele_Laino
now we have to find the solutions of this system: \[\left\{ \begin{gathered} 7x - 8y = 6 \hfill \\ 8x - 5y = 11 \hfill \\ \end{gathered} \right.\]
Michele_Laino
  • Michele_Laino
right?
anonymous
  • anonymous
what do you mean?
Michele_Laino
  • Michele_Laino
sorry, I believed that we have to find the solutions also
Michele_Laino
  • Michele_Laino
we have completed our exercise
anonymous
  • anonymous
its ok lol. thanks though. i really appreciate it
Michele_Laino
  • Michele_Laino
:)

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