help?
http://prntscr.com/9cfdte

- anonymous

help?
http://prntscr.com/9cfdte

- Stacey Warren - Expert brainly.com

Hey! We 've verified this expert answer for you, click below to unlock the details :)

- jamiebookeater

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

- UsukiDoll

for the first one, try cross multiplying
|dw:1449732602548:dw|

- UsukiDoll

|dw:1449732628434:dw| now try cross multiplying the 10 and the 6

- UsukiDoll

|dw:1449732697104:dw| what is 10 times 6

Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

- anonymous

(x+7) * (11) = 11x+77
10 * 6 = 60

- UsukiDoll

yes|dw:1449732950975:dw| but it looks like your multiple choice doesn't require distribution for the (x+7)(11) part

- UsukiDoll

but it means the same thing :)

- anonymous

my mistake we dont multiply 7x and 11

- UsukiDoll

it's alright.

- anonymous

so the answer would be C

- UsukiDoll

yup

- 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

ok

- UsukiDoll

|dw:1449733071631:dw|

- UsukiDoll

|dw:1449733108661:dw|

- UsukiDoll

now does this look like one of the answer choices?

- anonymous

yes

- UsukiDoll

yup should be the first one :)

- anonymous

is it just one answer or are there others?

- UsukiDoll

hmmm let's check to see if there are more :)

- anonymous

:)

- 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

the first choice is the only valid step.

- anonymous

ok ty, i have one last question can you help me with it?

- UsukiDoll

sure

- anonymous

http://prntscr.com/9cfh6g this is it

- 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

so maybe
|dw:1449734122942:dw| not 100% sure

- anonymous

would the answer be 5?

- UsukiDoll

cross multiplying gives
4x=20 but yeah I suck at these :/ x would be 5. but again no confidence here XD

- anonymous

its all good illl just go with that answer cx thnx somuch for the help

- 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

lol xD

- anonymous

the answer was 7.5 x'D

- UsukiDoll

oh lord D: see what I mean

- anonymous

xD

- UsukiDoll

my discrete math class is doing graph theory blarghhhhhhhh D:
geometric proofs are the worst

- anonymous

oh god, math in general is just not my subject xD

- 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

lol you should be

- UsukiDoll

but I'm kind of nervous on this final course...presentations. omg

- UsukiDoll

intro to the methods of research :(

- anonymous

dont be nervous you can get it done * says in an inspirational tone of voice*

- UsukiDoll

thanks. I'm doing my presentations on Number Theory because it's my favorite and easy ^^

- anonymous

lmao sounds good

- UsukiDoll

thanks ^^

- anonymous

np

Looking for something else?

Not the answer you are looking for? Search for more explanations.