kudum

Subtract 8 from 17. 17-8 = 9 There are 9 goats still in the barn.

10 years ago

y'(x) = 6/(6x-1)

10 years ago

(x-2)(2x-3) +(x^2-3x-1)*1

10 years ago

d= 8(7-t) d= 6t 56 -8t = 6t 56 - 8t + 8t = 6t + 8t 56 = 14t 56/14 = 14t/14 t = 4

10 years ago

5y * 8y -3 *2 (5y + 2)(8y - 3)

10 years ago

210KB - 220.5KB = -10.5KB = 10.KB

10 years ago

1 km = 1000 meter 1h = 60 min km = 450/1000= 0.45 hr = 3/60 = 0.05 speed = distance/time = 0.45/0.05 = 9km/h

10 years ago

(5)/(x-1) + (2)/(x+1)=-6 5(x+1)+2(x-1) = -6(x-1)(x+1) 5x + 5 + 2x -2 = -6(x^2 + x -x -1) 7x +3= -6(x^2 - 1) 7x + 3 = -6x^2 + 6 6x^2 -6 +7x +3 = 0 6x^2 + 7x -3 =0 (3x -1)(2x +3) = 0 3x- 1 =0 2x + 3 = 0 x= 1/3 x= -3/2 -3/2, 1/3 both are solution of x.

10 years ago

24/60 *360 degree = 144 degrees

10 years ago

(4x-1)/(x+3)(x+4)* (x+4)(x-3)/(2x-1) =(4x-1)(x-3)/((x+3)(2x-1))

10 years ago

8(x - 8) - 6(x - 3) + 3x. 8x -64 - 6x +18 + 3x 8x -6x + 3x -64 +18 = 5x - 46

10 years ago

25.8 * 48 =1238.40 I = amount - borrow I = 1238.40 - 950 = 288.40 Rate = I/borrow = 288.40/950 *48/12 = 7.6%

10 years ago

1.R(x) = (12 -0.5x)(36 - 2x) = 432 – 6x – x^2 = -x^2 -6x + 432 h = -b/2a = 6/-2 = -3 = -(3)^2 -6(3) +432 = -9 + 18 + 432 = 441 (-3, 441) 12 -1.50 = 10.5 2. 2x + 3y = 1200 = x + 1.5y = 600 x = - 1.5y + 600 A = LW = (-1.5y + 600)y = -1.5y^2 + 600y h = -b/2a...

10 years ago

total is x of red and green 120 = 4/7x 120(7) = 7(4/7x) 840 = 4x x = 210 red = total - green red = 210 - 120 red = 90

10 years ago

c = 121

10 years ago

(x+2)(x +3) = 0 x +2 = 0 x+ 3 = 0 x = -2 x = -3

10 years ago

45kg + m kg

10 years ago

5W +15 - 6W - 30 = 0 -W -15 = 0 W = -15

10 years ago

2x^2- 4x -6x +12 - (x^2 -5x + x -5) 2x^2 -10x +12 - x^2 +4x +5 = x^2 -6x + 17

10 years ago

9x^2 +12x -32 0 (3x + 8) (3x -4) =0 3x + 8 = 0 3x - 4 = 0 x = -8/3 x = 4/3

10 years ago

x = -b/2a x = -300/2(-5) x = -300/-10 x = 30 both are correct

10 years ago

= 97/100

10 years ago

child-- c c + 17.20(10) = 18.00(11) c + 172 = 198 c + 172 -172 = 198 - 172 c = 26

10 years ago

(p + r)(4) = 40 (p -r) (5) = 40 p + r = 10 p -r = 8 2p = 18 p = 9 9 + r = 10 r = 1 = 1 MPH

10 years ago

2A = ah + bh 2A - ha = bh = (2A -ah)/h = b

10 years ago

yes. He is correct.

10 years ago

1000 ml = 1 liter 12000/250 = 48

10 years ago

1/2(4x+10)=16 2x + 5 = 16 2x + 5 -5 = 16 -5 2x = 11 2x/2 = 11/2 x = 11/2 check 1/2(4 *11/2 + 10) = 16 1/2 ( 22 + 10) = 16 1/2(32) = 16 16 = 16 answer x = 11/2

10 years ago

Ans B

10 years ago

x - 2tan^-1(x) + c

10 years ago

3x^3y+x^2y^2 = xy(3x^2 + 2y)

10 years ago

mean = (1+3 +5+5 +7 +8 +9 +10)/8 48/8 = 6

10 years ago

0.05n + 0.1d = 4.75 d = 2n 0.05n + 0.1(2n) = 4.75 0.25n *100 = 4.75 8100 25n = 475 25n/25 = 475/25 n = 19 d = 2n d = 2(19) d = 38 dimes = 38 nickels =19

10 years ago

C - 5

10 years ago

A of frame = 1 2 * 14 =168 glass = 8 * 10 = 80 Whole frame - glass 168 -100 = 68

10 years ago

P = 4s = 4(32) = 128 feet

10 years ago

30d

10 years ago

bra = 5n neck = n 5n +n = 192 6n = 192 6n/6 = 192 n = 32 necklace = 32 Bracelet = 160

10 years ago

necklace = 160

10 years ago

L = 3w -1 Area = Lw 30 = (3w-1)w 30 = 3w^2 - w 3w^2 - w - 30 = 0 factor if not factor then use quadratic formula

10 years ago

-37 = 3x + 11 -7x -37 -4x +11 -37-11 = -4x -48 = -4x 12 = x -m/3 - 2 = 10 -m -6 = 30 -m = 36 m = -36

10 years ago

-158 = -2x + 14x - 14 -158 = 12x - 14 -158 +14 = 12x - 14 +14 -144 = 12x x = -12

10 years ago

15 = -7/8(45 -x) 120 = -315 + 7x 435 = 7x x = 62 1/7

10 years ago

1- 10w - 7 = -10w - 6

10 years ago

z^2 + 18z + 45

10 years ago

a^4b + a^2 B^3

10 years ago

4.5% (132500) = 5962.50

10 years ago

A = LW L = w + 5 36 = W(W + 5) 36 = W^2 + 5W W^2 + 5W - 36 = 0

10 years ago

11 * 102 - 228 1122 - 228 = 894 894 /6 = 149 149 + 51 = 200

10 years ago

(102x -228)/6 +51 = 200

10 years ago

17/51 *100

10 years ago

42% * 87 = 36.54

10 years ago

22/88 *100 = 25%

10 years ago

5x(x-3)/(x -1)(5(x-3) x/(x-1)

10 years ago

A = LW A = 2/3 L 2 2/3 2/3 = 8/3W 2/3 *3/8 = 3/8(8/3W) 1/4 = W

10 years ago

Vp= 724(cos(60), sin(60)) = 724 (1/2 , (√3)/2) = (362, 362√3) Vw = 32(cos(0), sin(0)) = (32, 0) VR = (√394^2 + (362√3)^2)) = 740.5 km/h tanθ = (362√3)/394 θ = tan^-1(362√3)/394) θ = 57.85 degree N = 32.15 degree

10 years ago

9-n/5 = 19 45-n = 95 45 - 45 - n = 95 - 45 -n = 50 n = -50

10 years ago

3x + 4 < 9 =3x<9-4 = 3x<5 = x<5/3

10 years ago

first is correct = -3 + 2(6z +1) = -3 +12z +2 = -1 + 12z

10 years ago

they are all correct.

10 years ago

3x<= 150 x<=50

10 years ago

= 60 +12x 60 + 12(4) = $108

10 years ago

5x - y = 0 3x + y = 24 8x = 24 x = 3 5(3) - y = 0 15 - y = 0 15-15 - y = 0 -15 -y = -15 y = 15 ( 3, 15) 2) 3x +3y = 27 x - 3y = -11 4x = 16 x = 4 4 - 3y = -11 4-4 - 3y = -11 -4 -3y = -15 y = 5 (4, 5) 3) 6x + 4y = 42 2(-3x + 6y = -6) 6x + 4y = 42 -6x + 6y...

10 years ago

6x -3y = 15 7x + 14 y = 10 14(6x - 3y = 15) 3(7x + 14y = 10) 84x - 42y = 210 21x + 42 y = 30 105x = 240 x = 16/7 y = -3/7 (16/7, - 3/7) 1. No Solution 2. Infinitely many solutions

10 years ago

you're welcome.

10 years ago

2) the last is wrong. 2. one solution

10 years ago

54 * 96 = 5184 54 + 96 = 150

10 years ago

P - C = R + C - C R = P - C

10 years ago

cos(a) = 1/2 a = cos^-1(1/2) a = 60 degrees

10 years ago

x + y = 60 4.49x + 5.95y = 317 substitution method x = 60 - y 4.95(60 - y) + 5.95y = 317 297 - 4.95y + 5.95 = 317 1y + 297 = 317 y + 297 - 297 = 317 - 297 y = 20 x + 20 = 60 x + 20 - 20 = 60 -20 x = 40

10 years ago

200 * 2.55 = $ 510 510 * 1.35 = $688.50 200 * .97 = 194 688.5/194 = $3.55

10 years ago

x = 1-2y 5x -4y = -23 5(1 -2y) - 4y = -23 5 - 10y - 4y = -23 5 - 14y = -23 5 - 5 - 14y = - 23 -5 - 14y = -28 y = 2 x = 1- 2(2) x = -3 (-3, 2)

10 years ago

68/5 - 25/4 =(272 - 125)/20 = 147/20 = 7 7/20 1/6 + 3/4 ( 2 + 9)/12 = 11/12

10 years ago

xbar = 50 X, (X, - x) 2 30 (30 -50)^2 = 400 32 (32 - 50)^2 = 324 33 (33- 50)^2 = 289 35 (35- 50)^2 = 225 49 (49 -50)^2 = 1 50 (50 -50)^2 = 0 50 (50 -50^2 = 0 71 (71 -50)^2 = 441 73 (73 - 50)^2 = 529 77 (77 -50)^2 = 729

10 years ago

0.5x +1 = .25x + 5 0.25x = 4 x = 16

10 years ago

a. z = (64 - 63.4)/2.3 b. z = (64 - 63.4)/(2.3/Sqrt(43))

10 years ago

A =7/30 *90 degrees A = 21 degrees B= 23/30 *90 = 69 degrees

10 years ago

a. v = at b.g = pe/mh c. p/2 -l = w d. (d-a)/ab = c

10 years ago

3z^3+2z-12z^2-8 = 3z^3 -12Z^2 + 2z -8 = 3z^2(z-4)+2(z -4) =(z-4)(3z^2 +2)

10 years ago

6a + 7b <= 2200 pound iron 12a + 6b <=2400 minutes labor graph those (a on x and b on y) line 1 (iron) (367,0) and (0,314) solution on or below) line 2 (labor) (200,0) and (0,400) (solution on or below) intersection at (75,250) so test 3 points (0,314) (7...

10 years ago

2x^2 + 4xy = 600 4xy = 600 -2x^2 y = (300 -x^2)/2x v = x^2y = x^2(300-x^2)/2x = 150x - x^3/2 dv/dx = 150 - 3/2 x^2 0 = 150 -3/2 x^2 x = 10 y = (300 - 10^2 )/2*10 y = 10 V = x^2 y V = 10^2 (10) V= 1000 Cm^2

10 years ago

400F = Av^2 V = sqrt(400FA) or = 20Sqrt(FA)

10 years ago

400F/A = Av^2 V = sqrt(400F/A) or = 20Sqrt(F/A)

10 years ago

z= (130 -135)/25.1 z = z = (181- 135)/25.1 z =

10 years ago

Lexi's --- x Maria's --- 250-x Lexi spent 2/5 of x, so she has 3x/5 left Maria spends 40, so she has 250-x-40 or 210-x left 3x/5 = 210-x times 5 to get rid of fractions 3x = 1050 - 5x 8x = 1050 x =131.25 So Lexi had $131.25 and Maria had 118.75

10 years ago

rulers --- x folders --- x+16 x + x+16 = 36 2x = 20 x = 10 y = 26 so she bought 10 rulers and 26 folders cost of ruler --- y cost of folder --- y + .5 10y + 26(y+ .5) = 20.20 10y + 26y + 13 = 20.20 36y = 7.2 y = 0.20 A ruler costs $0.20 and a folder costs...

10 years ago

P = 2l + 2w

10 years ago

z= (42-37.5)/7.6 z = 0.59

10 years ago

= (x-h)^2 +(y-k)^2 =r^2 = (x+7)^2 +(y+3)^2 = 13^2

10 years ago

R(x) = Px R(x) = (28-5x)x R(x) = 28x - 5x^2

10 years ago

mu = np mean = np = 0.22 *16 =3.52 Standard Deviation = Sqrt(n PQ) = Sqrt(16 *.22 *.78) = 1.656985

10 years ago

$2.88/18 = 0.16 cent

10 years ago

960t - 192(2) = 192t 960t - 384 = 192t -384 = 192t -960t -384 = -768t t = .5 .5 hour 1/2 hour

10 years ago

3/2 = x/40 2x = 120 x = 60

10 years ago

C = 2x + 2y C = 16x + 4y A = xy 900 = xy y = 900/x C = 16x + 4(900/x) C = 16x + 3600/x C' = 16 - 3600/x^2 0 = 16 - 3600/x^2 16 = 3600/x^2 16x^2 = 3600 x^2 = 225 x = 25 y = 900/15 y = 60

10 years ago

y = 0 solve for x 3x + 4 = 0 3x+ 4 - 4 = 0 - 4 3x = -4 3x/3 = -4/3 x = -4/3 when x = 0, solve for y y = 3(0) + 4 y = 4 (-4/3, 0) and (0, 4)

10 years ago

(7w +14)/12 = (2w - 14)/6 7w +14 = 4w - 28 7w - 4w + 14 = 4w - 4w - 28 3w + 14 = -28 3w + 14-14 = - 28 -14 3w = -42 w = -14

10 years ago