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# 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

- Miss KayLv 41 decade agoFavorite 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!!

- foggisanLv 51 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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- Anonymous1 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)