Monday
June 27, 2016

Posts by john

Total # Posts: 7,798

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

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.
May 16, 2016

Pre-Calc
I just answered this one below.
May 16, 2016

Algebra
If you give your answers, we will be happy to check them for you.
May 16, 2016

Natural Sciences
If you have the formula correct, then it looks like 1 Sulfur and 3 Oxygen
May 16, 2016

Math
5/12 times 2/12 with replacement
May 16, 2016

math
If it is simple interest, the formula is I=Prt time is in years so 60/12 = 5 year I/Pt = r
May 16, 2016

math
You have to use a random number table to choose 5 random numbers. Do this at least 10 times. You might get numbers like 57014 in this case 7 represents arrives late. the next number might be 03698 in this case 8 and 9 represents arrive late so you have 2 After you finish the ...
May 16, 2016

Math
1 - (1/5 + 1/10 +1/4) 1- (4/20 + 2/20 + 5/20) 1/5 (8400) spent on rental
May 15, 2016

math
10/5 = 8/m 2 = 8/m m = 4km/hr
May 15, 2016

Math
1/5 x + 3/8(4/5 x) x - 1/5 x - 3/8 (4/5 x) = 12.00 x - 1/5 x - 3/10 x = 12.00 10/10 x - 2/10 x - 3/10 x = 12 5/10 x = 12 x = 24 1/5 (24) = $ 4.80 on book 3/8 (19.80) =7.20 check 24 - 4.80 - 7.20 = 12
May 15, 2016

Math
45/ 90 = 120/x 1/2 = 120/x x = 240
May 15, 2016

math
$1.00 is 100 cents I just moved the decimal place two places to the right.
May 13, 2016

maths
A. no because there are only 3 blue B. highly unlikely since there is only 1 red C. You could get exactly 3 green since there are 10 green D. There cannot be more red removed since there is only 1.
May 13, 2016

Math
12!-(11!x2) = 399168000 is what i got
May 13, 2016

Math
There are 12 students to be seated in a row of 12 chairs. Paul and Martha have broken up and will not sit together. How many different seating arrangements are possible?
May 13, 2016

algebra pls pls help
x = =-b/2a b = -16 so -b = 16 a = 4 x= 16/8 = 2 Find y by substituting
May 12, 2016

Math
cos 20 they are the same because they are complementary angles. 70 + 20 = 90 80 + 10 = 90
May 12, 2016

N.H.H
x = # of $5 y = # of $1 x + y = 14 5x+ y = 26 -x-y = -14 5x + y = 26 4x = 12 x = 3 y = 11
May 12, 2016

Pre Calculus
The following table shows the rate of water flow (in L/min) through a dam. t (min) 1 5 9 13 17 21 25 V'(t) (L/min) 6 6 2 2 3 6 2 Approximate the total volume of water that passed through the dam from t=1 to t=25 using Simpson's rule, with n=6.
May 12, 2016

math
Which equation matches the following description?James loves making smores when he goes camping with his family.He puts half a chocolate bar on every smore.The number of chocolate bars,c,James needs is dependent on the number of smores,s,he wants to make. c=2s c=1/2s S=2c s=1/2c
May 11, 2016

Physics
How high will an arrow travel into the air when shot upwards? Bow stress: 68 J Arrow: 26 g (there is no air resistance)
May 11, 2016

math
a 14 foot ladder placed against a vertical wall of a building with the bottom of the ladder standing on level ground 9 feet from the base of the building. how high up the wall does the ladder reach?
May 10, 2016

math
Describe Sam´s location relative to the theater. Ordered pairs:Sam (4,2),Theater:(-3,5)
May 10, 2016

Maths
If Rick has $500 In his account after 4 years investing at 2.5% per year , how much money did he deposit initially ? Use =A =P (1+ r/n) 2). Your new laptop cost $1500 but depreciates in value by about 21% each year. a) How,much will your laptop be worth in 6 years ? Use A= Pe...
May 6, 2016

life orientation
Do a google search and I bet you will find a lot of examples.
May 6, 2016

Math 3
4 * 10^4 2 times 4= 8 subtract exponents 6-2 = 4
May 6, 2016

Math
E + E = O 1 + 1 = 2 2 3 1 ONE 2 3 1 ONE 4 6 2 TWO This is one possible solution, but there may be others.
May 6, 2016

MATH HELP PLEASE
1 -3 are correct. #4 anything raised to the zero power = 1 5 = 6) -16r^2 -10r 7) b multiply the coefficients and add the exponents. 8) d
May 6, 2016

Math
red = 95 blue = 5 x green red + green = blue -189 replace with what we know from above. 95 + green = 5 x green - 189 95 + g = 5g -189 194 = 6g divide by 6 to find number of green. Multiply that number times 5 to get the number of blue marbles.
May 6, 2016

Math
If y=8 when x=4,find y when x=5
May 5, 2016

Math
120 times 400 + 119.75 times 100 I think they may be including the extra 100 chairs.
May 5, 2016

Business math
8.50 + 11 (24) = 272.50 The total price Carrying charges 72.50 divide $11 into 200
May 5, 2016

Math
Monday 1/3 read means 2/3 unread Tuesday reads 3/10 of 2/3 He has 1/5 of the book left = 35 multiply 5 times 35 to get your answer. 1
May 5, 2016

trigonometry
from a second-storey window directly across the street. the angle of elevation of the top of an office building is 67 degre 30 mins. and the angle of depression of the base 18 degre 20 mins. if the building are 38 meter apart. wat is the height of the building ??
May 5, 2016

science
Use the penny to determine its hardness.
May 5, 2016

Math
Use Simpson's Rule and all the data in the following table to estimate the value of the integral b=-5 a=-11 x= -11 -10 -9 -8 -7 -6 -5 y= 6 -9 -3 -9 -1 -9 -1
May 4, 2016

Math Please Help ASAP
m^2 - 7
May 4, 2016

Algebra 2
I agree with your first two answers. Do you have an answer for the 3rd one?
May 4, 2016

algebra
290 because the 4 is less than 5.
May 4, 2016

Math
900 + 180 + 13
May 4, 2016

MATH HELP ASAP
For 1-4, cannot see the graphs. 5. To find the slope choose any two points (0,-4) (1, -3) change in y divided by change in x -4 - (-3) divided by (0-1) -1 / -1 = 1 Now, can you do 6?
May 4, 2016

math
a) 280 -250 divided by z = 1.2 Use a z- table to find the probability greater than z = 1.2
May 4, 2016

Physics
Suppose that two concentric rings, each with equal mass per unit length are joined so that they rotate together. Find the moment of inertia.
May 4, 2016

math
Just like you would multiply 2345 x 5679 Just multiply and when you are done put a decimal point two places from the left because there are two decimal places in the problem.
May 3, 2016

Math
To reach the ground, the height would be zero. 0 = -5t^2 + 35t - 2 You need to use the quadratic equation to solve for t, because this is not factorable. b) Time up = time down c) -b/2a will give you the max. height. -35/-10 = 3.5 meters -
May 3, 2016

algebra PLEASE HELP ASAP
4 red out of a total of 16 4/16 of a red You replace the red so you still have 16 7/16 chance of a blue AND means both events have to happen to you multiply the two fractions. 2) there is no replacement. Getting the same is the same as in #1 But... getting the blue is now 7/15...
May 3, 2016

algebra PLEASE HELP ASAP
a) the number of pink divided by the total number of pink and brown. b) the number of brown divided by the total number of pink and brown.
May 3, 2016

math help me asap
12! means 12 factorial that means 12 times 11 times 10 times 9 times 8 times 7 times 6 times 5 times 4 times 3 times 2 times 1. 4! is 4 times 3 times 2 times 1 8! is 8 times 7 times......all the way down to 1. Most people do this math using a calculator with a factorial key. ...
May 3, 2016

Math
x = -6 and x = 3 so x+6 = 0 and x -3 =0 (x+6)(x-3) = 0 0 = x^2 +3x -18 This will open up. 0 = -x^2 - 3x +18 This will open down. You can set this equal to y now. If you work backwards. Factor out the negative 1, factor the trinomial, you will can solve it and find the roots of...
May 3, 2016

math
the problem says the roof rises that is the 8 over a distance of 12 8/12
May 3, 2016

math
The is the same as the one I just answered, but with different numbers. Can you do it? rise/run.
May 3, 2016

math
pitch is rise divided by run 6/27 reduce this answer.
May 3, 2016

algebra PLEASE HELP ASAP
1) It is 1/3 of 90 2) 8! divided by 5! 3) is a combination 12! divide by (4!8!) 4) I agree with you 5) I agree with you.
May 3, 2016

Math
Since both = y, they must = each other x^2 + 2x = 3x + 20 x^2 -x -20 = 0 Now, factor: (x-5)(x+4) = 0 Can you find the values of x?
May 3, 2016

Math
Honor calculus students.. I think it would be skewed. More higher scores than lower scores. I don't think there would be much variation. What do you think?
May 3, 2016

algebra PLEASE HELP ASAP
1) I agree 2) 8/43 times 12/43 3) I am not sure what the question is asking. There is a weird symbol. 4) no replacement 5/14 times 3/13
May 3, 2016

Math
(19 + 21 + 22 + 28 + 18 + x) divided by 6 = 27 multiply both sides by 6 19 + 21 + 22 + 28 + x = 27(6) Now solve for x.
May 3, 2016

Math
I just did this one or one like it a few minutes ago. Please look for that post.
May 3, 2016

math
Sounds like the 46 is the diameter of the circle. area = pi times r-squared area = 3.14 times (23)squared or area = 22/7 times (23) squared
May 3, 2016

math
I would think that most of the heights would be very, very tall with a few shorter. The tail would be on the left with data clumped to the right. If the tail is on the left, it is skewed to the left. Do you agree?
May 3, 2016

Math
3/8 times 1/.03 = amount of vanilla in millimeters.
May 2, 2016

7th Math
1.5 x .946 x 7 every 3 days would get you 7 times in 21 days.
May 2, 2016

jiskha
It is free and everyone here volunteers their time.
May 2, 2016

health
You need to relax and think. What gets rid of body wastes? Would it be muscles? Do you know what cardiovascular is? How about excretory? I bet these words are in your texbook or else search them on the web. Come back with your answer and someone will check it.
May 2, 2016

7th Grade Math
145.16 rounded to the nearest hundredth.
May 2, 2016

7th Grade Math
90 miles times 1/.62 miles will give you the number of kilometers. so.. you are dividing .62 into 90 This will also be your miles per hour because the question is per hour to begin with.
May 2, 2016

math
5 times .75 = how much you need. Subtract 2.5 from your answer to see how many more cups you need.
May 2, 2016

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