math help please? thanx?

Question

1- if x is divisible by 4, then it is divisible by 8 if false if x equals ___
2. the direct distance between NY and Boston is 190 miles. The direct distance between NY and Chicago is 720 miles. What could be a direct distance between Bostan & Chicago?
3.Janna paid $24 for shoes that were on sale for 40% off the original price. What was the original price?
4.the squareroot of 18 added to the squareroot of 50 is equivalent to__
5.What is the slope of the line whose equation is 2x-3y-15=0?
6.What is the diameter of a circle whose circumference is 12?
(the answer must be over the pi symbol either squared or not)
7.the ratio of the sides of two similar squares is 1 to 5. what is the ratio of the area of the smaller square to the area of the larger square?
8.How many different 5 letter arrangements can be formed in the word READY if its used once?
9.The distance between points R &S is 10 units. How many points are equidistant from R &S and also 4 units from S?

thanx..

Answer 1

1 - false, it's not true when x = 4.

2 - 720-190 = 530

3 - 24 = .4*P ---> P = 24 / .4 = $60

4 - sqrt(18) + sqrt(50) = sqrt (9 * 2) + sqrt(25 * 2) = 3sqrt(2) + 5sqrt(2) = 8sqrt(2)

5 - 2x-3y-15=0 --> -3y=-2x+15 --> y = (2/3)x - 5 :: slope = 2/3

6 - d = 12/pi

7 - A1 = 1^2 = 1 A2 = 5^2 = 25 A1:A2 = 1:25

8 - There are 5 letters so 5 * 4 * 3 * 2 * 1 = 5! (five factorial)

9 - none, the closes equidistant point is 5 from both of them.

Answer 2

1.A multiple of only 4

2.530 miles

3.The originl price=24/0.6=$40

4.Sqrt 18 + sqrt 50
=sqrt(9*2)+sqrt(25*2)
=3*sqrt2+5*sqrt2
=sqrt2(3+5)
=sqrt2*(8)
=sqrt(2*64)
=sqrt(128)

5.- 2x-3y-15=0 --> -3y=-2x+15 --> y = (2/3)x - 5 :: slope = 2/3

6 - d = 12/pi

7 - A1 = 1^2 = 1 A2 = 5^2 = 25 A1:A2 = 1:25

8 - There are 5 letters so 5 * 4 * 3 * 2 * 1 = 5! (five factorial)

9.On the RS segment the answer is 1 for both are equidistant from R &S .
Generally 6 / infinite no of points are 4 units from S.

Answer 3

I'm not going to do all your work. I'll help with the ones that interest me.

8.How many different 5 letter arrangements can be formed in the word READY if its used once?
5! = 120
This is a basic permutation formula.

9.The distance between points R & S is 10 units. How many points are equidistant from R & S and also 4 units from S?

The locus of points equidistant from two given points is the straight line that is the perpendicular bisector of the line segment between the given points.

Now, the line segment between R & S is 10 units. So the point equidistant between R & S is 5 units away from both points. All the other points on the perpendicular bisector are farther away. Since all points on the perpendicular bisector are at least 5 units away from R & S, none are as close as 4 units. So the answer is zero.

Answer 4

I'm assuming this is about the area of a circle, which the formula for is pi x (r squared). Pi is usually figured as 3.14, so it's just 3.14 times the square of the radius, which means that increasing the radius of the circle will also increase the area of a circle. If you already know the area of a circle, to get the radius, you would first divide the area by 3.14, and the radius will be the square root of whatever remains. For example, if you were given a radius of 3 cm, the square of that would be 9 cm squared, and the area would be 9 cm squared x 3.14. You just turn the equation around to do it in reverse and get the radius.

Answer 5

1.a multiple of only 4

2.530 miles

3.the originl price=24/0.6=$40

4.3rt2+5rt2=7rt2=rt98

5.-3y=-2x+15
adding -2x
diviving by -3
y=(2/3)x-5

6.12/pi
=12/3.14
=3.82

7.1:25

8.10*9*8*7*6

9.on the RS segment the answer is 1 for both
generally infinite no of points

Answer 6

Ok Danny I will try to help ya..

1.) If x=4
2.) 720-190=530
3.) $24 x o.4=$9.6
4.) DOnt know
5.) 2/3
6.) 3.82

There that should get ya started