Math/multiple choice

Exam 1

College Algebra

C

D

D

A

D

D

A

__

x 4 V6

B

A

C

A

C

D

B

B

B

A

C

No number . D

A

C Computations

k2 - 4 (k 2 (k-2

x3 - 343 (x - 7 (x2 7x 49

______

V 16x4y2 4x2y

5x - 10 3x 5x - 10 3x (5x - 10 (x 1 ) - 3x (x-2

---------- ------- ---------- - ----- 0

------------------------------- 0

x-2 x 1 x-2 x 1 (x-2 (x 1

5x2 5x -10x -10 -3x2 6x 2x2 x - 10 (x 5 (x-2

------------------------------------- 0 ----------------- 0 ---------------- (x-2 (x 1 (x-2 (x 1 (x-2 (x 1 (x 5 (x 1 x 5 - x-1 ( No solution

____________ _______ ___ __ __

x -10 (V 102 - 4 (1 (1 -10 (V100 - 4 -10 (V 96 -10 (4V 6 -5 (2V 6

2 (1 ) 2 2 2

x (3 y )2 let x 0

[ (3 y )2 0 ] 2 3 y 0 y -3

[x2 0]2 x 0

x - 7 0 x 7

Area of Trapezoid (shorter parallel side longer parallel side ) x height

80 (x 2 /3 x ) 1 /2x

80 3x 2x 1

---------- ? --- x

3 2

80 5 1

--- x ? --- x

3 2

80 5

--- x 2 then divide both sides by 5 /6

6

96 x2 divide both sides by a square root to eliminate exponent 2

__

V96 x factor 96

______

V (16 x 6 x

__

x 4V6

hypotenuse base height 25 20 x x 5

P - 4 .2x2 67 .2x -4 .2 (x2 - 16x using completing the square formula (-16 /2 )2 64

P -4 .2 (x2 - 16x 64 -4 .2x2 67 .2x - 268 .8

Find x : ____________________ _______________

-67 .2 (V (67 .2 )2 - 4 (-4 .2 (-268 .8 -6 .72 (V4 ,515 .84 - 4 ,515 .84 x 8

2 (-4 .2 ) -8 .4

Find

: 67 .2 (8 ) - 4 .2 (8 )2 537 .6 - 268 .80

268 .80

_____

[x V 3x - 2] 2 x2 3x - 2 x2 - 3x - 2 (x-1 (x-2 0 x 1 or x 2

__ _____ (V3z V2z - 8 2 ) 2 3z 2z - 8 4 3z 2z - 4 z -4

3 (x (3 3

6 (27 - 8 )5 6 (19 )5 6 (2 ,476 ,099 14 ,856 ,594

____________

- y ( Vy2 - 4 (3 (2y2

2 (3

hypotenuse base height x 3 4 x 7 False

x2 - 3x 2 0 (x-1 (x-2 0 x 1 , x 2

x 3 12x - 4 x - 12x -4 -3 -11x -7 x 7 /11

- (-2 )4 - (-16 16

No number

7ab - [ (a-b (a-b )] (a b (a-b

7ab - [a2 - 2ab b2] (a b (a-b

7ab - a2 2ab - b2 (a b (a-b

-a2 9ab - b2 (a b (a-b

3 (2 9 6 9 15

----------- 1 ------- 1 ------ 1 15 2x x 15 /2

2x 2x 2x (- , -4

Reference

Loquinte , D Tarepe , D (2000 . Freshman College Algebra .2000 ed Philippine : MPSC Publishing House...