Posts by John
Total # Posts: 8,754

math
Are you looking for another solution? if so what do you think/ 
Math
You can tell the lines are parallel if you solve each equation for y. The number in front of the x is the slope as in y =mx+b 6y =3x + 10 divide by 6 to get m=1/2 second equation 6y = 3x 4 m = 1/2 or you could graph both equations and see that they are parallel. 
2 NDT grade math
green = blue + 2 blue + green = 15 blue + blue + 2 = 15 2b = 13 You can't have a 1/2 of a marble or can you? blue = 13/2 
Math
I would say elimination since the x has coeffs that are equal and opposite so they will eliminate very easily. 
us history
I agree again. 
us history
I agree with you. 
Math
If you use the elimination method and add the two equations together, if the variables are eliminated and you have a false statement like 0 = 15 then there is no solution. If you have a true statement like 0 =0 then there are many solutions. To check your work, you could also ... 
math
this is pathegreom theorem 22. Points A, B, and C are corners of a triangular field where mABC is 90°, AB is 40 meters and BC is 45 meters. a) Find the length of AC . A 40 m B 45 m C b) John walks along the edge of the field from point A to point C. If P is the ... 
math
John walks along the edge of the field from point A to point C. If P is the point on AC when John is nearest to point B, find the length of BP. 
Algebra 1 Honors
Does your formula work with what was given? 
Math
(9 + x)/2 = 6 This represents the average of the tests equal to 6. Multiply both sides by 2 9 + x = 12 Find x. Check to me sure the two tests have a mean of 6. 
Physics just verfiying an equation
As long as there is no denominator in the formula, each of your variables is directly related to centripetal force. This means if m, r or angular velocity are increased, then Fcent will increase. Due to the squaring on one variable, an increase in that variable will have a ... 
Algebra
You are correct. If you plot these points you will have a horizontal line crossing the yaxis at 3. If you do the vertical line test, It will only touch one part of the graph; therefore it is a function. It is okay to have different values of x map to the same value of y. ... 
math
3.60/12 4.96/16 5.20/20 You will get the price per ounce which represents a unit rate. Complete the division in each case and compare them to find the best unit rate. 
math10
If something cost $100 dollars if you have a 10% discount you would pay $90. Another 10% discount then you would pay $81. The percent Discount would be 10081/100 or 19%. So.. how dis we do this? Each time we paid 90% of the price. so .9 x .9 =.81 paid.. so our discount is 19% 
maths
tan 20 = 50/x tan = opp/adj. 
math10
Any easy way to deal with absolute value inequalities is to treat them like equations to begin with. You have 2 parts: x^2 x 3 = x^2 x 3 They are identical, so everything cancels here. Now take the opposite of the second polynomial. x^2 x 3 = x^2 +x + 3 2x^2 2x 6 =0 ... 
Math
You could graph these points and extend a line through the points to see if the lines cross at one point that would give you one answer. Since the problem states that they are linear, they won't have 2 answers. If the lines are parallel, no solution. If they really are the... 
Math
If points are all on the same line, then the slope has to be the same no matter what two points we use. Take the first two points and find the slope. change in y/change in x 4  3 divided by 8  6 1/2 so the slope is 1/2 Now, set 1/2 equal to the slope equation that you create... 
Biology
B b B BB Bb b Bb bb You see your possibilities. Now, can you get your percents? 
math
y = 5x + 8 y = 3.5x + 14 You need to graph each equation on the same graph paper and see where the two lines cross. That point is your answer. I will give you a start. The first graph has a point (0,8) and the second graph has a point (0, 14) Find two more points for each ... 
math
green 1/2 chance of even number white 2,3, 4, 5, 6 = 5/6 AND both happened 1/2 times 5/6 = 5/12 
Math
Do you really understand how to do these problems? 350 is 70% of what number is = of means multiply. One way to do the problem is to write out the equation based on the sentence 350 = .70 (n) Divide 350 by .70 you will get 500 Another method is called IS over OF 350/n = 70/100... 
health and pe
No.. not refusal. withdrawal means you are trying to get the drug out of your system. 
Algebra
x = larger y = smaller x + y = 14 y = 14  x 5 more than the larger 5 + 14 x 5 + 14x  3x Now, simplify 19 4x is the variable expression. 
Calculus
You got it right bro 
English  capitalization
The president invited Senator Smith to the White House for a meeting before preparing his address to the United States congress. Which of the following is an error in capitalization in the sentence above? A. The word "House" should be lower case. B. The word "... 
English  punctuation
Thank you. And yes, B needs one more comma between "strong" and "heavyset" And I agree with you on D. 
English  punctuation
which of the following sentences is punctuated correctly? A. The horse rode to our house, the beach, and around the church, before he started to tire. B. The strong heavyset fighter won his first fight, and he was featured in the newspaper. C. The ladies's hats were all ... 
English
Yea, "although" ruined it all. So I chose C. 
English
Although the path to success seemed clear, they were unable to take advantage of their position, and the other team triumphed. It was a humbling, but not catastrophic, failure. Which of the following is an independent clause from the sentences above? A. Although the path to ... 
Subjectverb agreement
Hey Damon, I agree with you. Physics is much easier than English :D. So is it C the correct answer? 
Subjectverb agreement
which of the following sentences demonstrates proper subjectverb agreement? A. News travel fast. B. Measles usually spread through respiratory fluids. C. Physics is a difficult subject to learn. D. They study of various sciences are compelling. A and D are not correct. C is ... 
English
Thank you again. 
English
After heart surgery, the patient spent all night quietly dozing until she was awakened by the cacophony of the hospital employees. Which of the following is the meaning for "cacophony" used in the sentence above? A. Harsh sounds B. Conversation C. Routine duties D. ... 
English
I got it! It should be: Getting out of the car, the nurse who was late for work, put the manual into a large blue tote bag. 
English
Hi Ms. Sue I don't know because the question itself is confusing So I think the correct sentence should be: The nurse, who was late for work, getting out of the car put the manual into a large blue tote bag. I don't know if it's correct or not. Which part of the ... 
English
The nurse, who was late for work, put the manual into a large blue tote bag getting out of the car. Which of the following is misplaced in the sentence above? A. put the manual B. who was late for work C. getting out of the car D. into a large blue tote bag My answer is A. ... 
English
Thank you, Ms. Sue! 
English
The smugglers stood before the judge, who was known for her strict manner, and entered their pleas with feint hopes that the evidence would not prove their guilt. Which of the following homophones should be used to correct the error in the sentence above? A. Gilt B. Faint C. ... 
calculus
i did get 8pi/3 but it wasn't one of the choices. Maybe there is a mistake in the question 
calculus
the region bounded by the graph f(x)=x(2x) and the x axis is revolved about the y axis. Find the volume of the solid. I did the integral using the shell method, but the answer wasn't correct. 
Math
Just put in the 3 for the y. 3(3+2) add the 3 + 2 then multiply by 3. 
math
Just treat them as x and y. No trick to the mixed numbers because it will happen automatically depending on the numbers use. x + y = 16 x  y = 5 add the two equations 2x = 21 Can you finish from here? 
Math
Usually, you use the chart method when you are trying to find the value of the money left. In this case, I don't see the values. It is no different that saying you have 43 more red markers than blue markers. After he give away 17 blue markers, he had twice as many red ... 
Math
x + y = 16 x  y = 15 add the two equations 2x = 31 so x= 31/2 or 15 1/2 So then y = 1/2 
U.S. History
I agree with B. 
Social Studies
I did a google search using 1943 riots Detroit and LA and got several great sources for you to use. It explains that problems started in LA and then Detroit had similar issues caused by race. 
Math
It is hard to tell sometimes, but an arithmetic sequence would have the same number added or subtracted. That doesn't seem to be the case. A could way to check for a geometric sequence is to divide the first number by the second. I divided 3888 by 216 and got 18. Next try ... 
Maths
Do you mean? (3x+2)/5 minus (2x + 3)/3 = 3 If so: Multiply by 15 to clear the denominators. since 5 goes into 15 3 times you have 3(3x+2) Since 3 goes into 15 5 times you have 5(2x+3) and 3 times 15 = 45 9x+6  (10x+15) = 45 9x + 6  10x 15 =45 x 9 =45 x = 54 so x = 54 ... 
Maths
If I am reading your problem correctly, I would say that h/45 = tan 25 degrees. Find the tan of 25 and multiply times 45 to get the height. 
math
What is the sum of all values of x that satisfy the equation (x2 5x+5)x2 +4x60 =1? Hint: There are three cases to consider I think I figured out 2 of the cases. The first one being x2 +4x60=0 while x2 5x+5=whatever. The second is x2 5x+5=1 and x2 +4x60=whatever. But I ... 
math
Formula for distance to the horizon for a satellite in orbit. d = sqrt(2rh+h^2) d = distance to the horizon h = height above sea level for the observer. r = radius of the earth  Solve for h. ie. so I can plug in d and r and get a solution for h. 
Algebra I
Factor the numerator and factor the denominator. Then cancel like factors. Which is 3x + 1 Note, you removed the 6 so that the terms in your factor will be positive and match the denominator's factor. 
Math
ax^2 + bx + c = y To find the solutions you let y = 0. x^2 + 6x + 9 = 0 x^2 + 7x + 12 = 0 x^2  4 = 0 x^2 + 4 = 0 Solve these and you will have your answer. 
physics
It takes 2.75s for the rock to hit the water at 54.45mph, how high is the bridge? 
7TH GRADE MATH
yes 9 
Math
2.The price of products may increase due to inflation and decrease due to depreciation. Derek is studying the change in the price of two products, A and B, over time. The price f(x), in dollars, of product A after x years is represented by the function below: f(x) = 72(1.25)x ... 
Social Studies
A quick google search will tell you if the Bighorn sheep can be found in New Zealand. 
Social Studies
A google search of Kiwi Bird... tells us they are nocturnal. 
Physics
Two springs are set up on a table. The longer spring has a spring constant of 221 N/m and an initial length of 44.0cm. The shorter spring has a spring constant of 725 N/m and an initial length of 22.0cm. How far above the table is an 9.30kg ball when it reaches its equilibrium... 
Physics
while walking behind a horse, a rancher walks 18.0 m (290degrees), then 25.0 m (340degrees) and finally 14.0 m (130 degrees) A)Calculate the displacement of the rancher b) if the rancher walks for 10 min, what is the average velocity of the walk? 
English
Thankyou 
English
What event (or events) mainly caused the fall of the British Empire? A. World War II B. the colonies rose up and fought back against the empire C. infighting between the British leaders caused it to implode from within D. both World War I and World War II My first choice (a.) ... 
Accounting, Business Studies, Economics and Maths Lit
we do something like every day make sure you read books you will could get marks 
chem equilibrium
Determine the pH of a buffer that is prepared by mixing 100 mL of 0.2 M NaOH and 150 mL of 0.4 M acetic acid assuming the volume is additive. Calculate the pH of the solution when 0.5 mL of 1 M of HCl was added hence calculate the buffer capacity.(Given:pKa of acetic acid = 4.... 
Chemistry
A crucial step is not stated in the solution above. You must use the limiting reactant when determining moles of the product. Very important that you compare the moles of NH3 with NiCl2 6H2O to see which one yields less moles, that will be the limiting reactant. In this case ... 
math
A meat department manager discovrs that she can sell m(x) killograms of ground beef in a week, where m(x) = 14 700  3040x, if she sells it at x dollars per kilogram. She pays her supplier $3.21/kg for the beef. a) Determine an algebraic expression for P(x), where P(x) ... 
Physics
A 0.01 kg Styrofoam ball is released from rest 2m above the floor. It reaches a speed of 3m/s the moment before it hits the floor. How much heat due to air resistance is generated during this process? 
Calculus
A spherical balloon is being inflated so that, at the time when the radius is 5m, the radius is increasing at the rate of 0.15m/s. (A) Find the rate of increase of the volume at this time. (B) If the rate of increase of volume thereafter remains constant, find the rate at ... 
math
x = amount at 4% 10,000 x = amount at 3% I = Prt Interest for amount at 4% is .04x since time is 1. Interest at 3% is .03(10000x) the 4% interest is $246 more .04x = .03(10000x) +246 
science
The range is always a maximum if the angle is 45 degrees. 
Algebra
Usually, time would be on the xaxis. slope is change in y/change in x slope = (64)/(4530) slope = 2/15 miles/minute 
Algebra
We need to see the graph. An easy way to make a match is to look for the intercepts and to check the slope. To make the equation easier to work with, I would multiply through by a 12 8x + 3y = 4 If x = 0 they y = 4/3 If y = 0 then x = 1/2 look for the points (0, 4/3) and... 
Physics
never mind, i think i found my mistake. 521m/s is the final velocity, not initial. thanks guys 
Physics
A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m in 0.003 seconds. Determine the acceleration of the bullet. So I basically used the formula: Change in position= (Initial ... 
Algebra
Draw the graph of y = 6x by filling in the table below. X y = 6x  2 1 0 1 2 Domain = ? Range = ? 
Math
if i have read 150 pages of a 240 page book, what percentage of the book have I read? 
Math
In the expression ln(3x)+ln(3+x) what is the highest possible number that x can be? I got to this point: ln(9x^2) but what now? it seems to me that there is an asymptote at x = 3, so the answer is 2.9999999... but it can't be repeating because that would make it 3, ... 
Algebra
Use the formula pH = −log[H^+] 9.. The hydrogen ion concentration of a substance is 4.3*10^6 × moles per liter.Find the pH. Round to the nearest tenth. 10. Find the hydrogen ion concentration of a solution whose pH is 5.3. 
Math
a plane flies 1.5 hours at 110 mph on a bearing of 10°. it then turns and flies 8.5 hours at the same speed on a bearing of 100°. How far is the plane from its starting point? 
Algebra
Richey Loaner inherited $2105.22 from a notsorich uncle. If Richie deposits his money into an account that pays 3% compounded continuously for t years, then the function A(t)=2105.22e^0.03t gives the account balance after t years. (a) Find Richie’s account balance 6 ... 
Chemistry
is delta S positive for the heating of water from 25 to 75 degrees Celsius? 
Physics
How do you calculate V^2 ? 
Physics
Thanks Damon 
Physics
An arrow is fired horizontally at a speed of 50m/s from the top of a vertical cliff overlooking the sea. The height of the cliff is 12m. Determine The speed and angle to the horizontal of the arrow when it enters the sea? 
Mathematics
An arrow is fired horizontally at a speed of 50m/s from the top of a vertical cliff overlooking the sea. The height of the cliff is 12m. Determine The speed and angle to the horizontal of the arrow when it enters the sea? 
maths
0.6 of the children in a club are girls, if there are 27 girls, how many children are there 
Algebra
Find the missing coordinate if (2/3, is a solution of 6x + 7y = 11 
Physics
I cant tell if ur srs or not? This seems like some taliban stuff 
chemistry
Help me solve it. Step by step please The value of kp at 20°c for the reaction 2NO(g) +Cl2(g) 2NOCl(g) is 1.9x10^3 atm1 calculate the value of KC at the same temperature. 
Physics
A gas cylinder has a volume on 200l, and contains Nitrogen at a pressure of 200kPa and a temperature of 290 degrees Kelvin. The molar mass of Nitrogen is 14.0067g. Calculate. The number of moles in the gas cylinder? 
Chemistry
The highest temperature ever recorded in Palm Desert, California, was 122„aF. Express this temperature in degrees Kelvin. 
Mathematics
Determine the points of intersection of the curve: y=(74x)/(x4) and the line y=2x1 
Math
Tickets to science exposition cost $5.75 each for students and $7.00 for adults. How many students and adults went if the ticket charge was $42.75? 
math
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bellshaped and has a mean of 55 months and a standard ... 
math
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bellshaped and has a mean of 55 months and a standard ... 
math
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bellshaped and has a mean of 56 months and a standard ... 
math
The average resting heart rate of a population is 89 beats per minute, with a standard deviation of 13 bpm. Find the zscores that correspond to each of the following heart rates. Round your answers to the nearest hundredth, if necessary. (a) 95 bpm Z= (b) 69 bpm Z= 
math
The average resting heart rate of a population is 89 beats per minute, with a standard deviation of 13 bpm. Find the zscores that correspond to each of the following heart rates. Round your answers to the nearest hundredth, if necessary. (a) 95 bpm Z= (b) 69 bpm Z=