Advanced+Algebra+Spring+2010

=Alxa Thammavongsa and Daisy Campos= =**__Chapter 6__**= media type="custom" key="6108609" the steps to doing a line regression. 1. you find some points to your problem. 2. you plug in the points in the list (go to STAT and then then press the EDIT) 3. you make sure you stat plot is on. 4. you press 2nd and quit to go to the main screen. 5. you go to STAT, and then move over to CALC. 6. press linear regression to go to the main screen. 7. press VARS and then move it to Y-VARS, pick FUNCTION and chose Y1 and then press enter. 8. press ENTER again to find the values of... 9.press GRAPH and it will show you the best line for the points. to find the equation to the line, go to Y= on the top left hand corner.

PRACTICE PROBLEMS

1. The points (7,3), (-14,-3), and (t,-1) lie on the same line. Find the value of the.

2. write an equation for the line passing through the point. (-9/8, 3/8) with a slop of 1/3.

3. graph the inequality 3x < 6-2y

4. after working a 3 hour job, Robert has $80 in his saving account. after working and 8 hour job, he has $180 in his savings account. Assume that robert deposits all his earnings into his savings account and does not spend any money. A. for an equation describe the money in his savings account //s// after he works //h// hours

B. how much money does Robert earn per hour.

C. how much money did Robert have in his bank account, before he started working.

5. rewrite the equation -3y+4x=12 in slope intersect form.

__**Chapter 7**__

1. g(x) = 3(1.4)^x , -2 < (or equal to ) x < (or equal to ) 5.

= = = = = = = = = = = = = = = = =__**Chapter 8.**__=

Simplify if [ ] is the square root for 1-4 Example [ 25 ] = 5, [ 320 ] = 8 * [ 5 ]

1. [ 396 ]

2. [ 25y^6]

3.35a^4b^-2 divided by 7a^-2b^-4

4. (u^3y^2 divided by 3w^4) ^3

5. A combination lock has combinations that consist of two digit and four letters. Find how many possible combination s there are.

6. If f(x) = 3^x +1, find f(-2)

7. Rewrite (b^3 divided by 2) ^-4 without using any negative exponents.

8. A forest preserve in the shape of a rectangle measures 7 kilometers by 24 kilometers. How far is it diagonally across the forest preserve?

9. If square root = [ ], then simple the expression: [4ab] * [4ab] , where a and b are positive numbers.

10. Kyle is trying to decided what to wear to homecoming. He has narrowed his choices down to three jackets, four shirts, two pairs of pants, and three pairs of shoes. How many different possible outfits are there with these choices?

11. Find the distance between the points with coordinates (5, 1) and ( -3, 3)

12. The volume of a cube is 343 cubic inches. Find the length of the side of the cube.

13. p*p^-1

=**__Chapter 9__**=

1-3, solve the equations. Round the results to the nearest HUNDREDTH. If there are no real solutions, state so.

1. x^2 - 3x - 10 = 0

2. m^2 + 3 = 2m

3. 3a^2 + 40 = 5a^2

4. Use the discriminate to find the number of real solutions. -3x^2 + 2x = 1

5. When an object is dropped near the surface of a planet or moon, the distance d (in meters) it falls in t seconds is given by the formula d =. 5gt^2, where g is the accelerations due to the gravity. Near Neptune, g = 9.9 m/sec squared.

An empty fuel tank is jettisoned from a space probe to Neptune, when the probe is 0.86 kilometer about Neptune's surfae. To the nearest tenth of a second, how long will it take the tank to reach the ground. , mjmumjmjimjjukjmuikiu \ 6. A rectangle has sides of length r centimeters and (r+3) centimeters. The area of the rectangle is 820 centimeters. Find the value of r.

7. An arrow is shot upward from a height of 5 feet with an initial velocity of 128 feet per second. Its height, in feet, t seconds after being released is modeled by -16t^2 + 128 + 5. To the neatest tenth of a second, how many seconds after release will it first be 150 above the ground?

8-9, graph the equation.

y= -x^2 + 8 y= x^2 - x- 6≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥mm