some math help?

Question

1. http://i209.photobucket.com/albums/bb248/pielover757/bleachtcg1.jpg

2. http://i209.photobucket.com/albums/bb248/pielover757/bleachtcg2.jpg

3. http://i209.photobucket.com/albums/bb248/pielover757/bleachtcg3.jpg

4. http://i209.photobucket.com/albums/bb248/pielover757/bleachtcg4.jpg

Answer 1

1)

3√20 + 4√12 + 5√20 + 3√5 =

3√4√5 + 4√4√3 + 5√4 √5 + 3√5 =

3 x 2√5 + 4 x 2√3 + 5 x 2√5 + 3√5

6√5 + 8 √3 + 10√5 + 3√5

8√3 + 6 + 10 + 3 √5

8√3 + 19√5

The answer is A

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2)

let

x = the fourth number

x + 240 + 16 + 600 = 1600.24

x + 856 = 1600.24

Transpose 856

x + 856 - 856 = 1600.24 - 856

x = 744.24

The fourth number is 744.24

Add

240 + 16 + 600 + 744.24 1600.24

The average is 400.06

The answer is D

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3)

Slope form is

y = mx + b

Slope = - 3/2

Ordered Pair

(3, 2)

2 = - 3/2(3) + b

2 = - 9/2 + b

Transpose - 9/2

2 + 9/2 = - 9/2 + b

2 + 9/2 = b

4/2 + 9/2 = b

13/3 = b

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The equation

y = - 3/2x + 13/2

The answer is B

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Answer 2

2 is D, 4 is A

Answer 3

#13 you have to reduce your radicals before adding them.

#14 they already gave you the sum of all 4 numbers. Just divide the sum by 4

#15 Plug in your cordinates and slope in the following equation:
y - y1 = m (x- x1)
y1= y value of the point x1= x value of point
m= your slope
Solve this and youve got your equation.

#16 This is Scientific notation. Basically move the decimal point the amount of times it is raised by 10
ex a: 134 X 10^5= 13,400,000. I moved the decimal point 5 times to the right
ex b: .005 X 10^3 = 5. I moved the decimal point 3 times to the right.
I hope this has helped you. Thank you for helping review my Algebra 1 and 2 skills over summer vacation before I enter pre-cal and trig. so I'll give you the letter answers to all 4 problems. but to prevent you from cheating, I will not give them in coresponding order which is #13, 14,15 & 16 respectively, so you still have to figure it out yourself.
B
A
A A

Answer 4

1. A
If you can divide the square root by 4, then you can double the number on the outside, and then add all of them up.

2. D

3. B

4. A

Answer 5

1.a

2.D
(1000.24/4)

3.B
Y=MX+B
2=-3/2(3)+B
2=-4 1/2+B
B=6.5
Y=-3/2X+6.5

4.a
exponents tally 10
numbers tally 2 000 000
strictly follow BEDMAS

Answer 6

1. A
2. D
3. B
4. A

Answer 7

on the 1st one I'd say it's none of these.