Saturday
August 27, 2016

Posts by john

Total # Posts: 7,879

Pre-Calculus
With linear programming, you have to graph each of the equations. x<=y also is needed along with your other equations. Shade in the correct area for the inequalities and look at your intersection points.
June 7, 2016

math143
Are you looking for the x and the y intercepts? if so, let x = 0 and solve for y let y = 0 and solve for x. 4y = 18 -5x = 18 Can you finish from here?
June 7, 2016

math143
Find the way intercepts for 4y-5x=18
June 7, 2016

math143
A. Substitute those values into the equation, simplify does the left side = -167 b. again, put both values into the equation. Does the left side = 51, if so.. it is a point on the graph. to find the y intercept. Let x = 0 and solve for y.
June 7, 2016

math143
2x3-4x2+23=y A.is(-4,-167) a solution? Show/explain b.is(3,51) a point on the graph c.give the y-intercept
June 7, 2016

physics
what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork
June 4, 2016

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?
June 4, 2016

math
You need to subtract 144 from each side and not add it. So.. I still agree with your answer.
June 3, 2016

math
I agree.
June 3, 2016

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.
June 3, 2016

math
Hi, I posted a question yesterday. How do I get to see if someone answered? Thanks, John
June 3, 2016

math
what is the current value of a pension of $ 200.00 per month for the next 15 years?
June 3, 2016

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?
June 2, 2016

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
June 1, 2016

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
June 1, 2016

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
June 1, 2016

math
Sara is lining a square tray with 1inch tiles. The side length of the tray is 9inches. How many tiles does Sara need?
May 31, 2016

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?
May 31, 2016

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 ...
May 31, 2016

math
RS = AB x = 2x + 7 x = -7
May 29, 2016

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.
May 27, 2016

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.
May 27, 2016

math
alright thanks
May 26, 2016

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
May 26, 2016

Math ms sue??? (Check my anwsers????)
Ok i figured out some that i got wrong but i'll that
May 26, 2016

Math ms sue??? (Check my anwsers????)
You dont know if I got any right?
May 26, 2016

Math ms sue??? (Check my anwsers????)
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) ...
May 26, 2016

math grade 9
only 1 out of the 11?
May 26, 2016

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 ...
May 26, 2016

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.
May 25, 2016

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. ...
May 25, 2016

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?
May 25, 2016

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
May 25, 2016

Algebra II
.60 less than 75000 .40 more .65 air condition .30 air .60 times .65 low and air .65 + .30 have working air
May 25, 2016

Algerbra
You really need to know how to do the problems. Copying answers doesn't help you at all in the end.
May 25, 2016

math
104 + .22(104) 120 -.25(120)
May 25, 2016

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
May 25, 2016

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 ...
May 25, 2016

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.
May 25, 2016

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 ...
May 25, 2016

Math
16 =k2 as one increases, the other increases. As one decreases, the other decreases. k = 8 y=8x
May 25, 2016

Math
f(x) = x + 2 the higher number you put in the higher answer you get. Think about x = 2 vs. x = 200
May 25, 2016

Statistics
.12 times .96 false positive times % who don't have the disease.
May 25, 2016

Algebra
C = 2605 + (25005/28)x
May 24, 2016

science
Net force is 5 because one side is pushing by 5 more newtons.
May 24, 2016

Math
x = y
May 24, 2016

itt-tech
In Newtons: 7000 x 9.8
May 24, 2016

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.
May 24, 2016

algebra
8000(1+.03)^4 Raise 1.03 to the 4th power and then multiply times $8000.
May 24, 2016

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.
May 24, 2016

Financial Math
4 numbers 2 letters (0-9) (26) (10^4)(26^2)
May 24, 2016

math
It depreciates $2500 per year. After it is x years old, it has depreciated 2500x.
May 24, 2016

CHECK MY WORLD HISTORY ANSWERS
5 is glass ceiling 9 native treaty rights All the others are correct.
May 24, 2016

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
May 24, 2016

math
you are right
May 24, 2016

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 ...
May 24, 2016

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...
May 24, 2016

Algebra
calories = 420t
May 24, 2016

maths
yes11
May 24, 2016

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
May 24, 2016

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 ...
May 24, 2016

Math
If you divide the other way 23.76/9.9 you will get 1:2.4
May 24, 2016

maths
(b, y) twice as much blue as yello (2, 1) (4, 2) (6, 3)
May 24, 2016

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
May 23, 2016

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
May 23, 2016

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.
May 23, 2016

Math
I just answered this below with quite a bit of detail.
May 22, 2016

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
May 22, 2016

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 ...
May 22, 2016

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 ...
May 22, 2016

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 ...
May 22, 2016

Economics
Set the two equations = to each other since this is equilibrium. Solve for P. Your answer is correct.
May 22, 2016

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)
May 22, 2016

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?
May 22, 2016

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 ...
May 20, 2016

Language Arts
its walk of two moons i have read it its a good book
May 19, 2016

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.
May 18, 2016

Geography
Another word for meeting
May 18, 2016

math
15+ .12x = 18 + .09x .03x = 13 Can you solve it from here? Divide both sides by .03
May 18, 2016

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. ...
May 18, 2016

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)
May 18, 2016

statistics
z= 4.6-3.5 divided by 1.2
May 18, 2016

Algebra
6/10 =60% or the 60th percentile.
May 18, 2016

Math
7/50 = ?? Multiply that answer times 100o to find about how many are defective each day.
May 18, 2016

Math
This like the other problem. Multiply the percent times 300.
May 18, 2016

Math
yes.
May 18, 2016

Math
.25 times 20 or 1/4 times 20
May 18, 2016

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
May 18, 2016

Math
It is the last one becasue of the term "healthy" they are trhying to lead you toward whole-wheat.
May 18, 2016

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 ...
May 18, 2016

Math Plz Explain
I agree it is C or the 3rd answer.
May 18, 2016

algebra 1
1856 + 113 divided by 5743
May 17, 2016

Algebra-Please Help!!!
I agree.
May 17, 2016

Math
Area = base times height 4.55 = 3.25 h 4.55/3.55 = h Can you finish from here?
May 17, 2016

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
May 17, 2016

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 ...
May 17, 2016

Geometry
sin 75 degrees = x/12 find the sin of 75 and multiply by 12
May 16, 2016

Math
yes.. one variable is data managmeent and the other is grade 12.
May 16, 2016

Social Studies/History
How awful
May 16, 2016

Ms. SUE please check
someone is using your name
May 16, 2016

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