anonymous
  • anonymous
help? http://prntscr.com/9cfdte
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
UsukiDoll
  • UsukiDoll
for the first one, try cross multiplying |dw:1449732602548:dw|
UsukiDoll
  • UsukiDoll
|dw:1449732628434:dw| now try cross multiplying the 10 and the 6
UsukiDoll
  • UsukiDoll
|dw:1449732697104:dw| what is 10 times 6

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More answers

anonymous
  • anonymous
(x+7) * (11) = 11x+77 10 * 6 = 60
UsukiDoll
  • UsukiDoll
yes|dw:1449732950975:dw| but it looks like your multiple choice doesn't require distribution for the (x+7)(11) part
UsukiDoll
  • UsukiDoll
but it means the same thing :)
anonymous
  • anonymous
my mistake we dont multiply 7x and 11
UsukiDoll
  • UsukiDoll
it's alright.
anonymous
  • anonymous
so the answer would be C
UsukiDoll
  • UsukiDoll
yup
UsukiDoll
  • UsukiDoll
alright so the next one seems scary because of that fraction. but if we multiply the entire equation by a we can get rid of that fraction
anonymous
  • anonymous
ok
UsukiDoll
  • UsukiDoll
|dw:1449733071631:dw|
UsukiDoll
  • UsukiDoll
|dw:1449733108661:dw|
UsukiDoll
  • UsukiDoll
now does this look like one of the answer choices?
anonymous
  • anonymous
yes
UsukiDoll
  • UsukiDoll
yup should be the first one :)
anonymous
  • anonymous
is it just one answer or are there others?
UsukiDoll
  • UsukiDoll
hmmm let's check to see if there are more :)
anonymous
  • anonymous
:)
UsukiDoll
  • UsukiDoll
so if we add 5 to both sides I should have this quadratic equation \[a^2+8a+5=0\] in the form of \[ ax^2+bx+c=0\] for a = 1 , b = 8, and c = 5 the discriminant formula \[b^2-4ac\] can be used as a test to determine if the quadratic equation is factorable. If our result is a perfect square then we can factor, if not, then we need to use the quadratic formula to find those roots. \[b^2-4ac\] for a = 1 , b = 8, and c = 5 \[64-20=44\] well that's not a perfect square number, but the question again just states the step needed for the equation the distribution on the second choice is wrong and we can't factor this, so the third choice is out too
UsukiDoll
  • UsukiDoll
the first choice is the only valid step.
anonymous
  • anonymous
ok ty, i have one last question can you help me with it?
UsukiDoll
  • UsukiDoll
sure
anonymous
  • anonymous
http://prntscr.com/9cfh6g this is it
UsukiDoll
  • UsukiDoll
woooooooooo that's a gamble since I haven't done this in a while but I'm assuming that the rectangle on the outside is double the size
UsukiDoll
  • UsukiDoll
so maybe |dw:1449734122942:dw| not 100% sure
anonymous
  • anonymous
would the answer be 5?
UsukiDoll
  • UsukiDoll
cross multiplying gives 4x=20 but yeah I suck at these :/ x would be 5. but again no confidence here XD
anonymous
  • anonymous
its all good illl just go with that answer cx thnx somuch for the help
UsukiDoll
  • UsukiDoll
probably because I studied a bunch of equations that geometry problems don't pop up too often so the techniques fade with time XD
anonymous
  • anonymous
lol xD
anonymous
  • anonymous
the answer was 7.5 x'D
UsukiDoll
  • UsukiDoll
oh lord D: see what I mean
anonymous
  • anonymous
xD
UsukiDoll
  • UsukiDoll
my discrete math class is doing graph theory blarghhhhhhhh D: geometric proofs are the worst
anonymous
  • anonymous
oh god, math in general is just not my subject xD
UsukiDoll
  • UsukiDoll
next semester I finish my BA in Math.. but I have to take more analysis courses to even be considered for the MA. So dang 5 more courses before entering the MA, but I'm glad that I finally made it XD
anonymous
  • anonymous
lol you should be
UsukiDoll
  • UsukiDoll
but I'm kind of nervous on this final course...presentations. omg
UsukiDoll
  • UsukiDoll
intro to the methods of research :(
anonymous
  • anonymous
dont be nervous you can get it done * says in an inspirational tone of voice*
UsukiDoll
  • UsukiDoll
thanks. I'm doing my presentations on Number Theory because it's my favorite and easy ^^
anonymous
  • anonymous
lmao sounds good
UsukiDoll
  • UsukiDoll
thanks ^^
anonymous
  • anonymous
np

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