- chestercat

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- anonymous

- anonymous

on a real number line point X has the coordinates of -2 and point y has the coordinates of 6 what is the line segment of XY

- anonymous

k

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## More answers

- anonymous

given the right trianglebelow how many units is AC|dw:1438780818865:dw|

- Nnesha

it's a right triangle so you can apply Pythagorean theorem \[a^2+b^2=c^2\]

- Nnesha

btw its one of special triangle
5,4,? ;P

- phi

the first way is to use pythagorean theorem
the 2nd way (really the first way) is to memorize some right triangle sides:
3,4, 5
and
5,12,13
are the sides of a right triangle. If you memorize these you will be faster.

- anonymous

see i know the threoum like its nothing

- phi

and if you really want to get good, notice that a multiple (multiply each side by the same number) is also a right triangle
for example if we multiply each side by 2:
6,8,10 is a right triangle
check it: 6*6+8*8= 36+64= 100 and 100 is 10*10

- anonymous

so in my choices that i have A 1 B SQRT 5 C 3 AND D 9

- anonymous

it would be SQRT of 5

- Nnesha

btw forgot the tell you c is the longest leg of right triangle (hypotenuse )

- phi

first, the leg is *always* shorter than the hypotenuse. so the number is less than 5
if you do not memorize 3,4,5 (which number is missing in your picture?)
then you solve it this way
x*x + 4*4= 5*5
x^2 +16= 25
add -16 to both sides
x^2 +16-16= 25-16
simplify
x^2 = 9
find the square root of 9

- anonymous

3

- anonymous

ohhh i see now a lil it would be c

- phi

now go back and think what you did wrong, and try to remember how to get the correct answer.

- anonymous

ok thx @phi

- anonymous

jose has 7 blue and 5 white shirts in one drawer in his dresser he is running late so whats the probability of pulling a white shirt randomly

- phi

probability is number of ways to "win" divided by the total number of choices

- anonymous

im thinking its 7:5 but sometimes i get it backwards

- phi

probability is between 0 (no chance) to 1 (100% going to happen)
so the fraction always has a smaller number up top
and a bigger number in the bottom
(unless it is 100% which would mean top and bottom are the same number)

- phi

How many shirts does he have?
how many are "winners" (i.e. white, the color we want) ?

- anonymous

sooo 5:7

- anonymous

ohh my b

- anonymous

7 blue 5 white

- phi

yes and that adds up to 12
now write the fraction:
number of ways to win divided by the total number of shirts

- anonymous

5:12?

- phi

yes, though I would write it 5/12
the 5:12 typically means "odds" like in horse racing. Odds are more complicated then probabilty

- anonymous

ight thx

- anonymous

imma close this one then reopen a new question ok @phi thx

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