Posts by henry

Total # Posts: 13,642

Math
Smith walks X meters. John walks 3x meters. Wilson walks 6x meters. x + 3x + 6x = 4500 m. X = ?.

Math
$X/45 = Cost per person. X/40 = X/45 + 10. X/40 - X/45 = 10 0.025x - 0.0222x = 10 X = $3,600 = Cost of the bus.

Math
X girls in class. 2x-10 boys in class. x + (2x-10) = x + (x+5). X = ?.

Math
$4900/7Days = $700/day. Apprentice earns $X/day. The barber earns $(x+200)/day. x + (x+200) = 700. X = ?

Math
Malika has X books. Amira has 4(x-7) books. 4(x-7) = 28. X = 14.

Algebra
85<((81+95+x)/3)<90. 85<((176+x)/3)<90 Multiply by 3: 255<(176+x)<270 Subtract 176: 79<X<94. Third quiz between 79 and 94.

Physics
Density = 4kg/5Liters = 0.80 kg/Liter.

Electrical
R1 = 8 Ohms. R2 = 12 Ohms. R3 = ?. 20I = 70, I = 3.5A. Rt = 20V/3.5A = 5.71 Ohms. Rt = (R1*R2)/(R1+R2) + R3. Rt = (8*12)/(8+12) + R3 = 5.71. R3 = ?.

Math
50cards/min. + 40cards/min. = 90 cards/min. T = 1350cards/(90cards/min) = 15 min.

Physics
V1 = 1 + 5i = 5.1m/s[78.7o]. V2 = 4 + 3i = 5m/s[36.9o]. 78.7 - 36.9 = 41.8o between V1 and V2.

maths for business Help!!!
P = (Po*r*t)/(1-(1+r)^-t. P = 600 * 240 = 144,000 X = Down payment. Po = 50,000-x r = 0.24/12 = 0.02/mo. t = 20 * 12 = 240 mo. 144,000 = (50,000-x)*0.02*240)/(1-(1.02)^(-240)) X = 20,258.87 Po = 50,000-20,258.87 = 29,741.13 I = P-Po

hookle's law
k = 50N/(25-20)cm = 10N/cm. L = 20 + (1cm/10N * 100N) = 30 cm.

math
See your previous post.

math
See your previous post.

math
Project A: 0.6*500,000 = $300,000 @ 8%. Project B: 0.4*500,000 = $200,000 @ 13%. (x, y) = (300000,200000). I = 0.08*300,000 + 0.13*200,000 =

Algebra
P(2,-3), m = 6. Y = mx + b -3 = 6*2 + b, b = -15 = y-int. Eq: Y = 6x - 15.

Math
At 3:00am your parents ring the doorbell for a surprise breakfast.u have strawberry jam,honey and Bread and cheese wat do u open first

physics
Circumference = pi*D = 3.14*1.2m = 3.77 m. 5rev/2s. * 3.77m/rev = 9.42 m/s. = Linear speed.

algebra
Another Method: t1 = 7 hrs. t2 = 1/3 * 7 = 7/3 hrs. 1/T = 1/t1 + 1/t2. 1/T = 1/7 + 3/7 = 4/7, T = 7/4 = 1.75 hrs.

algebra
t1 = 7 hrs. t2 = 1/3 * 7 = 7/3 hrs. T = t1*t2/(t1+t2) = (7*7/3)/(7+7/3). T = (49/3)/(28/3) T = 49/3 * 3/28 = 49/28 = 7/4 = 1.75 hrs.

Maths
a^2 + b^2 = c^2. c = Length of wire. 3^2 + 5^2 = c^2.

physics
V(B-C) = 500 - 320i + 75 + 1015i V(B-C) = 500+75 - 320i+1015i V(B-C) = 575 + 695i. Components: 575km E., 695km N.

Math
Water(cups) = 5c/3t = 1.7t. Water(cups) = 1.7t. T is the # of tea bags required.

Personal Finance
My answer is D, also.

Trigonometry
Tan60 = h1/d = h1/20. h1 = ?. Cos60 = d/h2 = 20/h2. h2 = ?. h = h1 + h2 = Ht. of tree.

Math
P2 = P1(1+r)^n = $60,000. r = 0.08/365 = 0.00021918/day = Daily % rate expressed as a decimal. n = 365Comp/yr. 12yrs. = 4380 Compounding periods. P1(1.00021918)^4380 = 60,000. P1 = ?.

Physics
a. S = d/t = (25+25)/(10.01+10.22) = yds/s. b. S = d/t = 25/10.01 = yds/s.

math
15c + 12w = 13.20*100 = 1320. Eq1: 15c + 12w = 1320. Eq2: C + W = 100. Multiply both sides of Eq2 by (-15) and add the Eqs. Remember that C and W are in KGs.

math
N = 2bags * bBeans/bag = 2b. So N = 2b.

physics
h = 0.5g*Tf^2 = 703 m. 4.9Tf^2 = 703, Tf = Fall time = ?. Tr+Tf = Time in light. c. Range = X1*(Tr+Tf).

physics
V1= 120m/s[78o]. X1 = 120*Cos78 = 24.9 m/s. Y1 = 120*sin78 = 117.4 m/s. a. Y2^2 = Y1^2 + 2G*h. 0 = 117.4^2 - 19.6h, h = ?. b. V2 = V1 + g*Tr. 0 = 117.4 - 9.8Tr, Tr = 12 s. = Rise time.

Physics
a. Va = 6rev/4s * 6.28rad/rev = 9.42 rad/s. b. Circumference = pi*2r = 3.14*0.30m = 0.942 meters. V = 9.42rad/s. * 0.942m/6.28rad = m/s = Linear or Tangential velocity.

Science
3. B.700 N. (Your Mass does not change).

physics
V2 = V1 + a*t. V2 = -8 m/s, V1 = 30 m/s, t = 0.010 s, a = ?.

physics
a. I = (20*200)/(240) + 1500/240. I = 16.67A + 6.25A = 22.92A. b. Energy = ((10*0.20kW) + 1.50kW.)*5h = 17.5kWh.

math
a. Cost = $93/mo. * 15mo. = $1395. b. Carrying Charge = 1395-1250 = c. $1250/($93/mo.) =

Algebra, Probability needed ASAP
See Related Questions: Thu, 5-7-15, 5:14 AM.

math
Cost = 45 + 0.21x = 66. X = ?.

speed
Tom's speed = X km/h. Jerry's speed = x-2 km/h. Tom: d = x * t. = 4x. Jerry: 4d/5 = (x-2)*t d = (1.25x - 2.5)t d = (1.25x - 2.5)4 d = 5x - 10. d = 4x = 5x - 10 4x = 5x - 10 X = 10 km/h. d = 10km/h * 4h = 40 km. = Length of the route.

Physics
Fo = M*g = 12 * 9.8 = 117.6 N. = Force of the object. Fp = 117.6*sln30 = 58.8 N. = Force parallel to the incline. Fn = 117.6*Cos30 = 101.8 N. = Normal force. Fs = u*Fn = 0.65 * 101.8 = 66.2 N. - Force of static friction.

Physics
a. t = d/V = 11*10^12m/(3*10^9m/s) = 3667 s. = 1.02 h. b. Wavelength = V/f = 3*10^8m/s/(8*10^9c/s) = 0.0375 m.

science
Disp. = 30i + 20 + 30*sqrt2[225o] Diep. = 30i + 20 + -30-30i = -10m = 10m West. For a different approach, see Related Questions: Sun, 7-29-12, 11:05 AM.

physical science
Load force = 600 N. Effort force = 100 N.

Geometry
A cone has diameter 12 and height 9. A cylinder is placed inside the cone so the base of the cylinder is concentric with the base of the cone and the upper base of the cylinder is contained in the surface of the cone. If the volume of the cone is nine times the volume of the ...

physics
See previous post: Mon., 5-8-17, 2:43 PM.

physics
a. Wavelength = 2 * 4m = 8 Meters. b. Wavelength = V/F1 = 8m. 340/F = 8, F1 = ?. F1 = Frequency of 1st harmonic. c. F2 = 2 * F1.

physics
Vs = 332 + 0.6*(-10) = 326 m/s = Velocity of sound. d = Vs * t/2 = 326 * 5/2 = 815 m.

physics
Vt = 180km/h = 180,000m/3600s = 50 m/s. = Velocity of the train. Vs = 332 + 0.6T = 332 + 0.6*19 = 343 m/s = Velocity of sound. Fr = ((Vs-Vr)/(Vs+Vt)) * Fh. Fr = ((343-0)/(343+50)) * 3500 = Fr = Frequency heard by the receiver(listener).

algebra
-11*sqrt(112) = -11*sqrt(16*7) = -11*4*sqrt(7) = -44*sqrt(7).

Physics 20
F = M*a, a = F/M = -1500/75.5 = -19.9 m/s^2.

maths
a. Area = L*W = 4.5 * 6 = 27m^2. b. Cost = 27m^2 * $20/m^2 = $540.

thermal physics
30mm = 0.030m. k = 2N./0.03m = 66.7 N/m. F = 66.7N/m * 0.035m - 2N. = 2.33 - 2 = 0.33 N. = Addition force.

Math
1. (4x^2 + 15x - 3) - (3x^2+5) = 4x^2 + 15x - 3 - 3x^2 - 5 = x^2 + 15x - 8. 2. -3f^2 + 4f - 3 + 8f^2 + 7f + 1 = 5f^2 + 11f - 2. 3. Ans: b. 4. Ans: b. 5. Ans: a. 6. Ans: -7. 7. 2^2 * 2^8 = 2^10. 8. (2.5*10^4)(4*10^3) = 10*10^7 = 1*10^8. 9. When multiplying, add the exponents: 5...

Physics
V1 = 115km/h = 115,000m/3600s = 31.94 m/s. V2 = 25km/h = 25,000/3600s = 6.94 m/s. V2^2 = V1^2 + 2a*d. d = 100 m., a = ?. Retardation is negative acceleration. Therefore, "a" will be negative.

Maths
1/3 = 3/9 = tomato juice. 2/3 * 2/3 = 4/9 = carrot juice. 9/9 - 3/9 - 4/9 = 2/9 = apple juice. (2/9)/(4/9) * 315mL = 1/2 * 315mL = 157.5 mL = apple juice.

Maths
Hasim counted his money. he gave 1/3 to his brother. he spent £12 on his sister. What he had left was half what he had at the beginning. how much did he give his brother?

Physics
Fk = u*Fn = 0.08*9.8M = 0.784M. -0.784M = M*a. a = -0.784 m/s^2. V^2 = Vo^2 + 2a*d. 0 = 6.7^2 - 2*0.784d, 1.568d = 44.89, d = 28.6 m.

pls help physics hw
Circumference = 2pi*r = 6.28 * 0.34m = 2.14m/rev. Period = 2.14m/rev/(39m/s) = NOTE: you cannot use cm AND meters. Use 0.34m instead of 34cm to make your units compatible.

Science
Correct!

Physics
a = (V2-V1)/T. V1 = 84m/6s = 14 m/s = Initial velocity. V2 = 180m/5s = 36 m/s. T = t1 + t2 = 6 + s = 11s.

Science
I = E/R. The resistance remains constant. Therefore, the current increases when you increase the voltage(E).

Physics
M*g = 100. M = 100/g = 100/9.8 = 10.2kg = Mass of the box. Fn = 100 - 10*sin60 = 91.34 N. = Normal force Fap-Fk = M*a. 10*Cos60-Fk = 10.2*0, Fk = 10*Cos60 = 5 N. = Force of kinetic friction.

discrete math
a. P = Po + Po*r*t. P = 8000 + 8000*0.1*10 = $16,000 After 10 years. Amt. = $16,000/10yrs. = $1600/yr. b. Same procedure as part a. c. 1st. BAL. = (Po + I) - 2500. = (8000 + 0.2*8000) - 2500 = $7100. 2nd. BAL. = (7100 + 0.2*7100)-2500 = $6,020. 3rd. BAL = (6020 + 0.2*6020) - ...

Math
Mean = (76+73+78+75)/4 = 75.5 A quick way to calculate the mean is to take the difference between the largest and smallest number and divide it by 2; then add the results to the smallest number: (78-73)/2 = 2.5, 73 + 2.5 = 75.5.

physics
V = pi*r^2*h = 3.14*(1.05)^2*3.79 = 13.1m^3. Density = M/V = 13500kg/13.1m^3 = 1,028kg/m^3.

physics
20cm/step 12 steps?. d = 20 * 12 = 240cm. = 2.40m. P = F * d/t = Mg * d/t. P = 750 * 2.4/5 = 360 J/s = 360 Watts.

Physics
70 -30 = 40g = Wt. of paraffin. V = 40g/(0.8g/cm^3) = 50cm^3 = Vol. of bottle. Mass = 30 + (50cm^3*1g/cm^3) = 80g When filled with water.

mechnical
1. V1 = 9000rev/min * 1min/60s * 6.28rad/rev = 942.5 rad/s. V2 = 5500rev/min * 1min/60s * 6.28rad/rev. = 576 rad/s. a. a = (V2-V1)/t

Physics pls help
M1V1 + M2V2 = 24 + 10i sqrt(24^2+10^2) = 26kg.m/s = Total momentum before collision = Total momentum AFTER collision.

physics
Correction: E = 0.039 Volts.

physics
E = L*di/dt = (9*10^-3)*(1.5-0.2)/0.3 = 4.33 Volts.

maths
Total = 390 cm. Red = X cm. White = x+40 cm. Blue = 3x cm. Purple = (x+40)/2 = 0.5x+20. x + (x+40) + 3x + (0.5x+20) = 390. 5.5x + 60 = 390, X = 60 = Red. Calculate the length of the other ribbons.

Math
6,4,2,1,5,3. 5,3,1,6,4,2. 4,2,1,6,5,3. 3,1,6,5,4,3. 2,1,6,5,4,3.

Math
6,5,4,3,2,1. 6,4,3,2,1,5. 6,3,2,1,5,4. 6,2,1,5,4,3. 6,1,5,4,3,2. 5,4,3,2,1,6. 4,3,2,1,6,5. 3,2,1,6,5,4. 2,1,6,5,4,3. 1,6,5,4,3,2.

Math
1. 1,2,3,4,5,6. 1,3,4,5,6,2. 1,4,5,6,2,3. 1,5,6,2,3,4. 1,6,2,3,4,5.

Math
A. False. B. True. C. False.

Math
R = PL/A. P = 1.68*10^-8 Ohm*m. L = 3.9 m. r = 1.1*10^-3/2 = 5.5*10^-4 m. A = pi*r^2 = 3.14*(5.5*10^-4)^2 = 9.5*10^-7 m^2. R = 1.68*10^(-8)*3.9/(9.5*10^(-7)) = 0.069 Ohms.

Algebra
Eq1: 3x-3y+6z = 15 Eq2:-3x-6y+3z = -3(times-3). sum: =9y+9z = -18, y + z = -2. Eq2: -5x-10y+5z = -55(times-5). Eq3: +5x-8y+13z = 19 Sum: -18y+18z =-36, y - z = 2. y + z = -2. y - z = +2. Sum: 2y = 0, y = 0. z = -2. Eq1: 3x-3y+6z = 15. 3x - 3*0 + 6(-2) = 15, 3x = 27, x = 9. ...

science
2. Their forces are equal and opposite. 3. Unbalanced forced.

physical sci
Water vapor.

math
2005, Jamal: 21 + 3 = 24 yrs. old. a. 2005, Malcolm: 24/3 = 8 yrs. old. b. 8-3 = 5 yrs. old.

physics
k = (M2-M1)/(L2-L1) = (30-20)/(16-14) = 5 g/cm. d = 20g * 1cm/5g = 4cm = Distance stretched. Lu = 14-4 = 10cm = Un-stretched length.

Math
A. 50gal/Load * 52Loads = 2600 Gal. = 347.6 Ft^3. Cost = 347.6Ft^3 * 7.64/100 = B. (17.2/7.48)FT^3/day * 365days = 839.3 Ft^3. Cost = 839.3Ft^3 * 7.64/100Ft^3 =

physics
Incomplete.

Math
24/4 = 6 meals/day.

maths
d = 24*(T+5/60) = 1.25*24*(T-4/60). 24T + 2 = 30T - 2, T = 4/6 = 2/3 h. d = 24*(2/3+5/60) = ?.

MATH
Correction:314/(314+211+197+2243+279+325) = 0.20 Quota = 0.20 * 64 = 12.81.

MATH
Quota = 314/(314+211+197+243+279+325) = 12.81.

math
Incomplete.

math
I = Po*r*t = 6400*(0.0853/360)*40 = $60.66. Effective rate = (60.66/6400) * 100% = 0.95%.

Trigonometry
This is a rt. triangle: A = 0.5b*h = 0.5*6*8 = 24 Ft^2.

Trigonometry
Tan 57.68 = 50/D. D = ?.

Trigonometry
Tan =

Trigonometry
Y = 67 in. X = 67/2 = 33.5 in. Tan A = Y/X = 67/33.5 = 2.0 A = 63.43o.

Math
F = 700*SIN15 = 181.2 Lbs.

Math
a/sin A = b/sin B. a/sin43 = 10/sin112, a = ?.

Math
V1 = V2*1.42, V1 = (V1-20)*1.42, V1 = 67.7 Mi/h. d = V1*T1 = 67.7mi/h * 1h = 67.7 m1.

Math
d = V1*T1 = V2*T2. V1 * 1 = V2*(60+25)/60, V1 = V2*1.4

science
M1*d1 = M2*d2. M2 = 40 * 2 = M2 * 3.2, M2 = 25kg = Girl's wt.

Physical Science
P = I^2 * R.

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