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anonymous

  • one year ago

@phi study help plz ACT study prep any one

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  1. anonymous
    • one year ago
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    @shenandoah123

  2. anonymous
    • one year ago
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    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

  3. anonymous
    • one year ago
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    k

  4. anonymous
    • one year ago
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    given the right trianglebelow how many units is AC|dw:1438780818865:dw|

  5. Nnesha
    • one year ago
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    it's a right triangle so you can apply Pythagorean theorem \[a^2+b^2=c^2\]

  6. Nnesha
    • one year ago
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    btw its one of special triangle 5,4,? ;P

  7. phi
    • one year ago
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    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.

  8. anonymous
    • one year ago
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    see i know the threoum like its nothing

  9. phi
    • one year ago
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    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

  10. anonymous
    • one year ago
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    so in my choices that i have A 1 B SQRT 5 C 3 AND D 9

  11. anonymous
    • one year ago
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    it would be SQRT of 5

  12. Nnesha
    • one year ago
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    btw forgot the tell you c is the longest leg of right triangle (hypotenuse )

  13. phi
    • one year ago
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    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

  14. anonymous
    • one year ago
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    3

  15. anonymous
    • one year ago
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    ohhh i see now a lil it would be c

  16. phi
    • one year ago
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    now go back and think what you did wrong, and try to remember how to get the correct answer.

  17. anonymous
    • one year ago
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    ok thx @phi

  18. anonymous
    • one year ago
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    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

  19. phi
    • one year ago
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    probability is number of ways to "win" divided by the total number of choices

  20. anonymous
    • one year ago
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    im thinking its 7:5 but sometimes i get it backwards

  21. phi
    • one year ago
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    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)

  22. phi
    • one year ago
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    How many shirts does he have? how many are "winners" (i.e. white, the color we want) ?

  23. anonymous
    • one year ago
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    sooo 5:7

  24. anonymous
    • one year ago
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    ohh my b

  25. anonymous
    • one year ago
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    7 blue 5 white

  26. phi
    • one year ago
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    yes and that adds up to 12 now write the fraction: number of ways to win divided by the total number of shirts

  27. anonymous
    • one year ago
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    5:12?

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

  29. anonymous
    • one year ago
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    ight thx

  30. anonymous
    • one year ago
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    imma close this one then reopen a new question ok @phi thx

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