Can't figure it out!MATH!!5 questions!Pleaaaasssseeee help meee!PLS!?

1.)Find:2,5% of 60

2.)Find the possible values for a,if the distance between the points is 17 and the coordinates of the points are(-4,a) and (4,2)

3.)Michael woks at an electronics store and earns a 6% commission on everything he sell.If he earns $1.800 in commission in one month,how much equipment did he sell?

4.)An arrangement or listing where order is not important is called a___________

5.)The_______is used to determine the number of real roots for a quadratic equation.

7 Answers

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  • 1 decade ago
    Favorite Answer

    1)Is that supposed to be 2.5% of 60. The answer is 15

    2)d = SquareRoot((x2 - x1)^2 + (y2 - y1)^2)

    17 = Square Root((8)^2 + (2 - a)^2)

    17 = SquareRoot(64 + 4 - 4a + a^2)

    17 = 4aSquareRoot(17 - a)

    3)This is a typo, right? Michael had to have earned $18.00.

    A percentage is the same thing as that number divided by 100. So if you take 6% of $18.00, you are multiplying 18 by 0.06.

    6% of $18.00 is $1.08. This product is how much commission he made, so you want to subtract it from the total amount of $18.00. Michael sold $16.98 worth of equipment.

    I'll admit that I'm not 100% sure that this answer is correct, so check some of the other aswers on this one.

    4)Combination(I got this answer from Statistics)

    5) Highest power...(ie x^2 would have 2 real roots)

    I hope you understand!!

  • 1 decade ago

    1)1% of 60 is 1/100th of 60 therefore 2.5% must 2.5 x that. (2.5x 00.6 = 1.5)

    2).Coordinates refer to a point on a grid with Eastings (side to side measurement) first and Northings(up and down) second.

    Thus point 1 is at -4 east and point B is at +4 east. The difference is 8. This is one side of a triangle and the second side will be the difference in the Northings. The distance between A & B is the hypotenuse. The square of the hypotenuse minus the square of 8 will give you the square of the Northings difference.

    Thus (17x17)-64 =225

    Square root of 225 = 15

    Therefore the difference in Northings is 15. This can be plus or minus so there are two possible values for a of (4+15)=19

    and (4-15)= -11.

    3) 1800 = 6% of the total so 1800/6=1% =300

    Therefore 100% =300x100= $30,000

    4) Not familiar with the terminology so can't help you, sorry.

    5) Ditto

  • 1 decade ago

    1) 2.5/100 × 60 = 1.5

    2) By using pythagorous :

    64+x^2=17^2

    x=15

    so a=15+2 or 2-15

    a=17 or -13

    3) 6%=1800

    so 100%=x

    x=100 × 1800/6 =30000 $

    4) set

    5) may God help you with it

  • 1 decade ago

    1) 2.5% of 60

    =2.5% * 60

    =25/10% * 60

    = 25 * 60/(10*100)

    = 3/2

    3) Let total amount be x.

    commision = 6x/100

    By condition,

    6x/100 = $1.8

    x = $1.8 * 100/6

    = $ 180/6

    = $30

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  • 1 decade ago

    1) 1.5

    2) 17 and -13

    3) $30,000

    4) Combination

    5) Discriminant

  • Anonymous
    1 decade ago

    0.025 x 60 = 1.5

    17^2 - 8^2 = (a - 2)^2

    +/-15 = a - 2

    a = -13, 17

    1.80/0.06 = $30

    Random

    brain

    Source(s): CP
  • 1 decade ago

    1. can't understand the question

    2. use the distance formula... d=sqrt of (xsub1-xsub2)^2+(ysub1-ysub2)^2.... just substitute..

    17=sqrt of (-4-4)^2+(a-2)^2

    17^2= -8^2 + a^2-4a+4

    289= 64+a^2-4a+4

    289-64-4=a^2-4a

    219=a^2-4a

    a^2-4a-219=0

    i can't solve any more.. just use the quadratic formula...

    3. dunno

    4. dunno

    5. dunno.. (actually i just forgot)

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