# Posts by john

Total # Posts: 8,426

**physics**

what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork

**Math**

Two boats leave the same place at the same time. The first sails in a straight line N70°W at 45 miles per hour and the second goes in a straight line S23°E at 57 miles per hour. After 1 hour, how far apart are the boats, to the nearest tenth of a mile?

**math**

You need to subtract 144 from each side and not add it. So.. I still agree with your answer.

**math**

I agree.

**statistics**

(100-110)/25 = z = -.4 (110-110)/25 = z = 0 you want to find the probability between -.4 and 0 you can look this up using a z-table or a calculator. I go .155 See if you agree.

**math**

Hi, I posted a question yesterday. How do I get to see if someone answered? Thanks, John

**math**

what is the current value of a pension of $ 200.00 per month for the next 15 years?

**Math**

Start with the idea that there are 180 degrees in a triangle and that angles w and x are supplementary which means they sum to 180 180 = w + x 180 = x + y + z Can you finish it now?

**math**

m = -14 -.4 divided by -5 -4 -14/4/-9 14.4/9 = m y+14 = (14.4/9)(x+5) the equation will be in y=mx + b form and you can change it to Ax+By =C

**math**

2) 8 fours out of 20 8/20 = 2/5 = .4 3) A part of the question is missing. 4) .15 times 20 will get your answer. 5) .2 times 50 6) 5/600 times 24000 7) I agree 8) 4/10 times 3/10

**math**

1) I am getting 30/50 for P(not red) so I disagree with your answer. 9) Write out your table: HHH HHT HTT HTH THH THT TTH TTT It looks like HHH and HTH appear once each. 10) 1/2 chance of a heads 4/6 to get a number less than 5 multiple the two to get 4/12 or 2/3

**math**

Sara is lining a square tray with 1inch tiles. The side length of the tray is 9inches. How many tiles does Sara need?

**physics**

You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is barely audible at your location, which of the following could be the wavelength of the sound?

**probability**

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 You have 21 numbers Which of these numbers are divisible by 5 or 3 5,6,12,15,18,20,21,24,25 9/21 or a decimal if your teacher requires that format. b) count up the even numbers and the prime numbers. Prime numbers are ...

**math**

RS = AB x = 2x + 7 x = -7

**Algebra Help**

Graph c should have a line that is slanting downward from left to right. y = -3x + 2 or 3x + y = 2 It should cross the y-axis at (0,2) It should cross the x-axis at (2/3, 0) Hope this helps.

**Algebra**

9 times 10^4 multiplied 8 times 10^6 multiply 9 times 8 = 72 with exponents you keep the base and add the exponents. 72 times 10^10 sci notation calls for one decimal place only 7.2 times 10^11 You have your exponent right, but didn't multiply the coefficients.

**math**

alright thanks

**math**

A line connecting the points (x, 12) and (12, 9) has a slope 1.4. Determine X. a. 9 b. 10 c. 7 d. 8 Steepest slope? a. 0.4 b. undefined c. 0.1 d. -1 over 7 Flattest slope? a. 7 over 9 b. 0 (THIS ONE) c. undefined d. 2 over 3

**Math ms sue??? (Check my answers????)**

Ok i figured out some that i got wrong but i'll that

**Math ms sue??? (Check my answers????)**

You don't know if I got any right?

**Math ms sue??? (Check my answers????)**

1) What would the slope be for a road that has a rise of 11m and a run of 100m? a. 22 over 100 b. 11 over 100 (THS ONE) c. 15 over 100 d. 30 over 100 2) What would the slope be for a road that has a rise of 5m and a run of 100m? a. 0.05 (THIS ONE) b. 0.25 c. 0.16 d. 0.02 3) ...

**math grade 9**

only 1 out of the 11?

**math grade 9**

can someone check over my answers and correct them? *over means fraction 1) What would the slope be for a road that has a rise of 11m and a run of 100m? a. 22 over 100 b. 11 over 100 (THS ONE) c. 15 over 100 d. 30 over 100 2) What would the slope be for a road that has a rise ...

**algebra 1**

$300 is what they will take in. How much is the prize? I need that to find expected value for Raul. The fair price of a ticket depends on the pay out.

**algebra**

You need a VENN diagram to answer this question with circles for mysteries, sci fi and romance. They will all intersect and there will be a triple intersection in the middle with "3" Then you work back to the double intersections... subtracting 3 from each of those. ...

**math**

A picture is copied onto a sheet of paper 8 inches by 10 inches. A 2-inch margin is left all around the picture. Find the length, width, and area of the picture. Length = 10 inches Width = 8 inches Area = 80 inches squared am i right?

**Algebra II**

one leg is 5 sqrt 3 the other leg is x the hypotenuse is x + 2 c^2 = a^2 + b^2 (x+2)^2 = x^2 + (5 rt3)^2 x^2 + 4x + 4 = x^2 + 75 4x + 4 =75 because the x^2 cancel. Can you solve from here

**Algebra II**

.60 less than 75000 .40 more .65 air condition .30 air .60 times .65 low and air .65 + .30 have working air

**Algerbra**

You really need to know how to do the problems. Copying answers doesn't help you at all in the end.

**math**

104 + .22(104) 120 -.25(120)

**Please help me with this math**

-3x + 5 <or = -22 Subtract 5 from both sides. Divide both sides by -3 When you divide by a negative, you have to switch the inequality which will give you > or equal to

**Math- Prob Stat**

p=.35 q =.65 .35^5 times .65^11 =_____ then you have to multiply that answer by the combination that gets you 16!/11!5! you do that because there are many ways to get those 5 people. It could be the first 5, the last 5, the middle 5 or any possible. b) .35^11 times .65^5 and ...

**Math**

To be even, you have to be divisible by 2. x/2 + y/2 =( x + y)/2 even numbers have a difference of 2. n + n + 2 = 2n +2 which is divisible by 2 or something like n+2 + n+4 = 2n+6 again divisible by 2.

**Math**

tan 60deg = y/x y/x =1.7325 tan 30 deg = y/(x + 6) = .577 x = shadow and y = pole y = 1.7325x y = .577(x +6) Since they both equal y, you can say.. 1.7325x = .577x + 3.462 Solve for x to get the shadow for the 60 degrees. Find y, by putting this answer into both equations. If ...

**Math**

16 =k2 as one increases, the other increases. As one decreases, the other decreases. k = 8 y=8x

**Math**

f(x) = x + 2 the higher number you put in the higher answer you get. Think about x = 2 vs. x = 200

**Statistics**

.12 times .96 false positive times % who don't have the disease.

**Algebra**

C = 2605 + (25005/28)x

**science**

Net force is 5 because one side is pushing by 5 more newtons.

**Math**

x = y

**itt-tech**

In Newtons: 7000 x 9.8

**Algebra**

For lines to be parallel, they have to have the same slope. (7 - (-2))/ 5 -7 9/-2 = m (1,3) Use the slope and the point to find the equation. There are many ways to do this. One is called the point slope formula: y - 3 = (-9/2)(x -1) simplify and solve for y.

**algebra**

8000(1+.03)^4 Raise 1.03 to the 4th power and then multiply times $8000.

**Algebra**

If two lines are perpendicular their slopes or gradients are negative reciprocals of each other: 5 -1/5 -4 1/4 1/2 -2 do you see the idea? Also the two gradients will multiply to equal -1. You can use that as a check.

**Financial Math**

4 numbers 2 letters (0-9) (26) (10^4)(26^2)

**math**

It depreciates $2500 per year. After it is x years old, it has depreciated 2500x.

**CHECK MY WORLD HISTORY ANSWERS**

5 is glass ceiling 9 native treaty rights All the others are correct.

**MATHS**

Not if the first is a negative. -5 and 7 =2 -1/2 + 3/4 = -2/4+3/4= 1/4 2 1/4

**math**

you are right

**math**

You normally would use a calculator or a table to look up the tan of a specific angle. This problem is asking for you to do it backwards. You have the tangent value and need to find the angle. On the calculator it is noted as tan^-1 or the inverse of tangent. I got 85.236 ...

**Math**

10 Put the data in order 6 7 10 12 13 15 17 20 Median is 12.5 Quartiles are 1/2 way between the median and the ends of the data. The first quartile is between 7 and 10 so that is 17/2 = 8.5 The third quartile is between 15 and 17 which is 16. The interquartile range is 16-8.5...

**Algebra**

calories = 420t

**maths**

yes11

**MATHS**

.8x = 120.00 .87x = 112.00 This represents an easier way to do the problem if there is 20% off that means you are paying 80% of the original cost. You are paying 87% if it is 13% off. To find the price at nine-irons divide 112 by .87

**maths**

x is positive and z is negative x has a larger absolute value xy = z solve for y, y = z/x y = a negative fraction because x is larger than z. let's say the answer is -1/2 that would be a possibility given the facts. y = -1/2 |y| = |-1/2| so |y| = 1/2 since that number is ...

**Math**

If you divide the other way 23.76/9.9 you will get 1:2.4

**maths**

(b, y) twice as much blue as yello (2, 1) (4, 2) (6, 3)

**Math**

Find the probability of each event. Spinning red on a spinner with equally sized red, blue, yellow, and green sectors, and flipping a coin that lands tails up

**astronomy**

After 1 half-life 50% should be gone. only 17% is gone, so this is just a portion of 1 half-life. 17/50 = .34 half-life 5730 times .34 should be your answer

**math**

I answered this when you posted it yesterday. You are correct it is c. However, you just guessed at an answer and you can't have -8 dogs. You would have to use the formula d + c =36 and equation c to get the exact answer.

**Math**

I just answered this below with quite a bit of detail.

**Math**

Take 1/2 of the middle term and square it to find c. 3/2 squared = 9/4 = c When you factor (x +3/2)(x + 3/2) check: x^2 + 3/2 x + 3/2 x + 9/4 x^2 + 6/2 x + 9/4 x^2 + 3x + 9/4

**math**

18 2/9 -13 4/7 The common denominator is 63 2(7)/63 for the first fraction 9(4)/63 for the second fraction 14/63 - 36/63 you cannot subtract the 36 from 14 You have borrow one from the 18 the 18 becomes 17 + 1 or 17 +63/63 Now, your problem becomes 17 77/63 -14 36/63 can you ...

**Geometry/Math**

You would need to change centimeters to inches first. 1 inch = 2.5 cm If you are buying cardboard to make the box, would you want to use the surface area instead of the volume? divide the amount by 2.5 to get inches then multiply times .05 to get the cost. I am assuming your ...

**Math**

It is c, because dogs have 4 legs and chickens have 2 legs and there are 56 legs in all. You can't have -8 dogs or 1/2 of either. You are just guessing right now. You would need d + c =36 along with 4d+2c + 56 to find the exact number of dogs and chickens. You would ...

**Economics**

Set the two equations = to each other since this is equilibrium. Solve for P. Your answer is correct.

**Geometry**

This is a tangent problem Tan(54 deg) = h/20 Once you find the Tan(54 deg) multiply by 20 to get the height. Use a table or your calculator to find Tan (54)

**physics**

A skier slides down a ski slope with an acceleration 2.2 m/s^2 directed down the slope. The coefficient of kinetic friction between the skis and the slope is 0.24. What is the angle of the slope with the ground?

**Statistics**

A breathalyser test is used by police in an area to determine whether a driver has an excess of alcohol in their blood. The device is not totally reliable: 7 % of drivers who have not consumed an excess of alcohol give a reading from the breathalyser as being above the legal ...

**Language Arts**

its walk of two moons i have read it its a good book

**Calculus**

A car accelerates from rest at 1.1+2(t^1/2) m/h per second for 9 seconds find velocity after 9 seconds.

**Geography**

Another word for meeting

**math**

15+ .12x = 18 + .09x .03x = 13 Can you solve it from here? Divide both sides by .03

**Math**

I would be happy to check your answers. Remember when multiplying you multiply the coefficients and add the exponents. 4x^3 x 5x^4 = 20x^7 for 18 and 19 you will use the distributive property. Multiply what is in front times each term inside the ( ) use the rule stated above. ...

**statistics**

You can find this by using a z-table. The .278 is in the body, find the value for c by using the margins. or you can use a graphing calculator. 2nd vars invNorm(.278)

**statistics**

z= 4.6-3.5 divided by 1.2

**Algebra**

6/10 =60% or the 60th percentile.

**Math**

7/50 = ?? Multiply that answer times 100o to find about how many are defective each day.

**Math**

This like the other problem. Multiply the percent times 300.

**Math**

yes.

**Math**

.25 times 20 or 1/4 times 20

**Math**

I think you are taking 1 marble from a barrel that contains the ones you have stated. Right? there are 16 marbles 14 are not yellow 14/16 = 7/8

**Math**

It is the last one becasue of the term "healthy" they are trhying to lead you toward whole-wheat.

**math**

You need to get a common denominator first. since 3 and 4 go into 12, I would use 12. Wait a minute is 57 supposed to be 5/7? If so, we need a different denominator. If not... 1/3 becomes 4/12 1/4 becomes 3/12 2/3 becomes 8/12 Now, order them from lowest to highest using the ...

**Math Plz Explain**

I agree it is C or the 3rd answer.

**algebra 1**

1856 + 113 divided by 5743

**Algebra-Please Help!!!**

I agree.

**Math**

Area = base times height 4.55 = 3.25 h 4.55/3.55 = h Can you finish from here?

**math**

2 times 1 times 10 first digit is 6 or 7 so that is 2 second digit is 1 so that is 1 choice 3rd digit could be 1-9 that is 10 choices

**Math**

In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 95% confident that your sample mean is within 11 minutes of the population mean? Assume that the standard ...

**Geometry**

sin 75 degrees = x/12 find the sin of 75 and multiply by 12

**Math**

yes.. one variable is data managmeent and the other is grade 12.

**Social Studies/History**

How awful

**Ms. SUE please check**

someone is using your name

**Pre-Calculus**

Try it and see f o g = f((g(x)) = a(cx +d)+b g o f = g(f(x)) = c(ax + b) +d Simplify.. it doesn't look like they are the same.

**Pre-Calc**

I just answered this one below.

**Algebra**

If you give your answers, we will be happy to check them for you.

**Natural Sciences**

If you have the formula correct, then it looks like 1 Sulfur and 3 Oxygen

**Math**

5/12 times 2/12 with replacement