anonymous
  • anonymous
Solve 8x2 + 7x - 15 = - 7. Enter your answers as decimals rounded to two places. in order from least to greatest.
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
an*
anonymous
  • anonymous
i got it straight from my homework i just looked again it is the same
sanchez9457
  • sanchez9457
Is that 8 times 2?

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More answers

anonymous
  • anonymous
yes
anonymous
  • anonymous
i think it is 7x minus 15
anonymous
  • anonymous
i think it is 8 times 2 plus 7x minus 15 = negative 7.
sanchez9457
  • sanchez9457
Multiply out 8 * 2 and add it to -15
sanchez9457
  • sanchez9457
then subtraact that new value to the -7 and divide by 7 and that should give you your x.
anonymous
  • anonymous
wait so 8*2 is 16 then adding it to -15 would be 1 right then you subtract that from -7 would be 8 and dividing it would 1.14 right? it says i have to have two decimals though so what do i do after that?
sanchez9457
  • sanchez9457
it would be -8 not 8. so it should give you -1.14 if you did your calculuations correctly. 1.14 is two decimal places. you have the tenths and the hundredths places.
anonymous
  • anonymous
no like 1.14 as one answer than there should be another answer for it
anonymous
  • anonymous
I think this is supposed to be a quadratic and you're going to want to use the quadratic formula...
anonymous
  • anonymous
first write it in the form ax^2 +bx +c =0 then plug the values of a b and c into the quad. formula
sanchez9457
  • sanchez9457
I don't quite understand this then. So that is not a multiplication like you said it's 8x?
anonymous
  • anonymous
it is from the lessons linear and quadratic functions
sanchez9457
  • sanchez9457
Oh so then that is not 8 times 2 , it's 8x^2
anonymous
  • anonymous
im so confused guys
sanchez9457
  • sanchez9457
Forgetting that little carrot is a huge thing.
anonymous
  • anonymous
it didnt have the carrot thingy
anonymous
  • anonymous
re-write it in the form ax^2 +bx +c =0 plug the values of a b and c into the quad. formula
anonymous
  • anonymous
where do i find the a b c thing
anonymous
  • anonymous
a=8 b =7 c=...?
anonymous
  • anonymous
or are you talking about the quadratic formula?
anonymous
  • anonymous
i have no clue honestly i am so confused right now
sanchez9457
  • sanchez9457
@Algebraic! : i'm not sure it's a quadratic equation sine he just said there was nothing squared. so the qudratic formula would render usless he made a mistake in copying the problem.
anonymous
  • anonymous
it's in your book or everywhere on the internet
anonymous
  • anonymous
im a girl first and second the problem is right in front of me it is right. and it is on my homework online
anonymous
  • anonymous
i got it guys thanks
sanchez9457
  • sanchez9457
Sorry about that!
anonymous
  • anonymous
no its fine thank you for trying
anonymous
  • anonymous
"im a girl first " so?
anonymous
  • anonymous
he kept calling me a dude

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