kuai

L = 4x-7 w = 3x+6 A = L*w A = (4x-7)(3x+6) = 12x^2+24x+-21x+-42 A = 12x^2+3x-42

13 years ago

(x-7)^2 (x-7)(x-7) = x^2-7x-7x+49 = x^2 - 14x + 49

13 years ago

12x-9y +2 =0 -12x-2 = -9y -12x/-9 -2/-9 = -9y/-9 y = 4x/3+2/9 The slope is 4/3 and y-intercept is (0, 2/9)

13 years ago

x^3 + x^2 + 3x - 12 remainder 16

12 years ago

this is b answer. x^3 + 3x + 2 remainder 2

12 years ago

y = kxz 33 =k *9* 12 33 = 108k k = 33/108 y = (33/108)(16)(22) y = 242/3

12 years ago

a = kbsqrt(c) 21 = k5sqrt936) 21 = 30k k = 21/30 a = (21/30)*b sqrt(c) a = (21/30) *9 8sqrt(2250 a = 189/2

12 years ago

1 = k5sqrt(36) 21 = 30k k = 21/30 a = (21/30)*b sqrt(c) a = (21/30) *9 sqrt(225) a = 189/2

12 years ago

v = kha 92 = k(12)(23) 92 = 276k k = 92/276 = 1/3 v = 1/3ha v = (1/3)(17)(27) v = 153

12 years ago

w = kav 225 = k(25)(40) 225 = 1000k k = 9/40 w = 9/40 av 270 = 9/40(40)(v) 270 = 9v 270/9 = v v = 30 mile per hour

12 years ago

P = y^2 Q = xy ç[0,9]ç[0(ãx)](ÝQ/Ýx-Ýp/Ýy)dy dx ç[0, 9]ç[0, ãx ](y-2y)dy dx ç[0,9]ç[0, ãx](-y)dy dx ç[0,9]-x/2 dx =(-x^2)/4 [0, 9] = (-81)/4

12 years ago

p = 0.68 n = 800 µ = np µ = 800(.68) = 544 Standard deviation = √(np(1-p) ) = √(800(.68)(.32) ) = 13.1939 µ±2σ (544 -2(13.193), 544+2(13.1939)) (517.6, 570.4) 554 is not unusual because it is in interval.

11 years ago

3p+1 = 5p-15 3P+ 1+15 = 5P -15 +15 3p +16 = 5p 3p-3p+16 = 5p -3p 16 = 2p p = 8

11 years ago

The critical region is 0.632. larger value fail to reject the null hypothesis. there is no enough evidence to support that the claim.

11 years ago

you use that formula when you know what to do. nCr nPr

11 years ago

1. x^2 = 22^2+ 27^2 -2(22)(27)cos60 x^2 =1213 -1188cos60 x^2 =619 x= 24.9 miles

11 years ago

a. mean = (1+3+5+3+2+29+3+4+2+1+2)/11 =55/11= 5 (1-5) = x (x-x̅) (x-x̅)^2 1 -4 16 3 -2 4 5 0 0 3 -2 4 2 -3 9 29 24 576 3 -2 4 4 -1 1 2 -3 9 1 -4 16 2 -3 9 b. Range= highest value - lowest value Range =29-1 = 28 c. variance = (x-x̅)^2 = 648 648/(11-) = 64....

11 years ago

Ax +By = C y-8 = 2x +6 y-8-6 =2x + 6 -6 y-14 = 2x y-y -14 = 2x -y -14 = 2x-y C

11 years ago

92/9+10/3 (92+30)/9 = 122/9 13 5/9

11 years ago

-6x + 24y =-60 6x - 24y = 60 there are infinite solution.

11 years ago

1650-1200 = 450 1200*0.08 = 96 450/96 = 4.7 years

11 years ago

A = P( 1+ r/n)^nt A= 200(1+.08/2)^2(10) = ?

11 years ago

99% confidence interval z = 2.575 p hat = 68/87 =0.7816 E= Za/2 *sqrt((phat(1-phat)/n)) E = 2.575*sqrt(0.7816*0.2184/87) E = 0.1141 phat-E < P < Phat+ E 0.7816-0.1141 <p< .7816+.1141 0.6675 < p < 0.8957

11 years ago

1. 8^2 x^2(x+6)^2 = 2. 480 = (w+10)w

11 years ago

g/4 +7 = 10 g/4 = 10-7 g/4 = 3 4(g/4) =3(4) g = 12

11 years ago

the rest are ok y= mx +b -4 = (-15)(1/2) +b -4 = -15/2 + b -4+15/2 = b 7/2 = b y = mx +b y = x/2 +7/2 Ax + By = C 2(y) = 2(x/2 + 7/2) 2y = x + 7 -x +2y = 7

11 years ago

YES. IF YOUR PROFESSOR SAID THAT YOUR ANSWER SHOULD BE IN PERCENT. P = 142/507 = 0.28 SD = SQRT( .28*.72/507) SQRT(0.2016/507) = 0.0199 Z = 1.96 0.28-+1.96*0.0199 0.28-+ 0.039 ( 0.241, 0.319)

11 years ago

YES. IF YOUR PROFESSOR SAID THAT YOUR ANSWER SHOULD BE IN PERCENT. P = 142/507 = 0.28 SD = SQRT( .28*.72/507) SQRT(0.2016/507) = 0.0199 1-a = .95 a =0.05 za/2 = z0.025 = 1.96 Z = 1.96 p -+ za/2 * SD/sqrt(n) 0.28-+1.96*0.0199 0.28-+ 0.039 ( 0.241, 0.319) I...

11 years ago

$275 + 80n = $835 275-275 +80n = 835-275 80n = 560 80n/80 = 560/80 n = 7

11 years ago

p(x) =-4x^2+48x-18 P'(x)= -8x +48 0 = -8x +48 8x =48 x = 6 5)C(x) = 20x+600 C(31)-C(30) = 20(31)+600-([20(30)+600]) 1220- 1200= 20 C(x) 20x +600 C'(x) = 20

11 years ago

1/6 ln(x^2-2)+c

11 years ago

1) 5h ¨C 9 = ¨C16 + 6h -9+16 = 6h-5h 7 = h 4x + 4 = 9x ¨C 36 36 +4 = 9x-4x 40 = 5x 8 =x 5) k < 0 6) q ¡Ý ¨C1 7) p < 8 8)g > 90 9)n ¨C 6 ¡Ý 2; n ¡Ý 8

11 years ago

6/30 = 10/x 300 = 6x x = 50 50/30 =x/10

11 years ago

x = 7-(1/8)y x-7 = -1/8y -8x+56 =y

11 years ago

y = mx + b f(x) = 2m + b = 1 f(x) = 4m + b = 0 f(x) = 6m + b = -1 -1(2m + b = 1) 4m + b = 0 -2m -b = -1 4m + b = 0 2m = -1 m = -1/2 2(-1/2) + b = 1 -1 + b = 1 -1+ 1 + b = 1 + 1 b = 2 y = mx +b y = -1/2x + 2

11 years ago

P=2l+2w 70 = 2(17) + 2w 70 = 34 +2w 70-34 = 34-34 +2w 36 = 2w w = 18

11 years ago

A = LW L = w-1 120 =(w-1)w 120 = w^2-w w^2-w-120 =0

11 years ago

mean = 9.3, median = 10, mode = 13

11 years ago

y = 0 0= .25x + 15 -15 = .25x x = -60 x =0 y= .25(0) + 15 y = 15 Slope is .25 (-60,0),(0,15)

10 years ago

x^2 -25 =0 (x -5)(x+5) =0

10 years ago

-16(t^2-4t-12) =0 (t-6)(t+2) =0 t - 6 = 0 t = 6

8 years ago

1/x^4

6 years ago

y = mx + b y - 2x = 4 y - 2x +2x = 2x + 4 y = 2x + 4 slope is 2

5 years ago