Posts by john

Total # Posts: 8,426

math
Try adding some of these together to look for the pattern: -13 +16 = 3 odd+even = odd -7 + 16 = 9 how about -13 + -7 = -20 -8 + 16 = 8 It looks like even + even = even odd + odd = even even + odd = odd So, we only get an odd result in this case. It seems that it is always true...

statistics
If the data is skewed to either the left or the right then you would use the median because the median is not influenced by single large or small inputs. If the data is normal, you will use the mean to find the middle of the data.

Math
5 lbs times 16 ounces/lb. 80 ounces of oatmeal. Now how many 8 ounce servings can you get. Divide by 8 to get your answer.

Math
p - 2o = sale price

Math
there are 12 inches in 1 foot. if you have 60 inches then you have??? feet. Can you finish from here 12 inches/ 1 foot = 60 inches/? foot

math
c + t = 70 c = 50 so: 50 + t =70 Can you find the number of trucks? Once you get that number you will subtract it from the number of cars to find out how many more cars you have than trucks.

Calculus
Evaluate using substitution ∫(2x^5+6x)^3(5x^4+3)dx where b=0 and a=-1 I got to here and then got stuck u=5x^4+3 du=x^5+3x+C ∫(2x^5+6x)^3 u 1/(x^5+3x+C) ∫(x^5+3x)^3 u

math
That is right. Rates have different units like miles/hour or feet/second

Algebra
0x^2 +0x +6 That would reduce to 6 This term has degree 0 because the degree refers to the x^0 and x to the zero power is just 1 so if I had 6x^0, then I really have 6(1) = 6 Since all of the terms in the original trinomial cancelled out due to the zero in the coeffient, we ...

Calculus
I was mistaken, it is b=x and a=0

Calculus
Find the interval on which the curve of ∫ 6/(1+2t+t^2) where b=0 and a=x is concave up. Heres my work but im not sure at all g '(x) = 6/(1+2x+x^2) g ''(x) = -(2+2x)/[(1+2x+x^2)^2] upward when g ''(x) > 0. - (2+2x) > 0 x < -1

langauge arts

math

Suggestions needed... No specific class
If you could see an everyday object improved by adding something mechanical what would it be? Cause be something that has to do with transportation, help disabled people, etc. For example, creating a wheel chair that is rough terrain and water accessible

Math
okay. Did you get 8?

Math
40/100 = 2/5 Multiply 2/5 times 20 Can you finish from here?

Algebra
Tangent problem of opp/adj tan 67 degrees = x/137 Find tan of 67 and multiply by 137 to find the height of the pole.

Math
If it is decreased by 17% then you will have 83% of the 200 which equals 166. This is similar to going into a store where there is a 20% off sale. You pay 80% of the original price.

Math
11.52(10) + 8x = 1160x where x is the cost of a pencil. 115.20 =1152x x = .1 or 10 cents. 1160 time .1 is \$116 11.52(10) + .1(8) 115.2 = .8 = \$116

Multiply
There are some short cuts: 1 will always work since the number is even (ends in 8) the number is divisible by 2. If the sum of the digits is divisible by 3 then the number is divisible by 3. If the number is divisible by 2 and 3 then it is divisible by 6.

Math
x + y = 12 x-y = 6 add these equations together to get 2x = 18 so x must be 9 Can you find y which represents the other digit?

accounting
Do a google search of these two terms and you will find a lot of good information.

Mechanics(Ms.Sue)
Yes.. velocity has a direction and speed does not. also, above the right answer is D.

Chemistry
I think it is because atoms are so small, you have to measure many of them.. so we are actually taking an average which results in decimals. Does that make sense?

Help
As you heat air molecules, they gain more energy and move farther apart which results in less density. control would be the amount of air in the balloon because that doesn't change since air isn't leaving or entering the balloon. Indep. would be the heat dep. would be ...

Algebra
There is no GCF here. I assume your -30 is supposed to be -30x. Right? (5x-3)(5x-3) This is a perfect square. You can tell because 5x times 5x equals the first term and -3 times -3 equals the 9. When you have perfect squares in the first and last term of the trinomal try the ...

geometry
41 1/3 sq yds divided by 2 1/3 gallons You need to use improper fractions 124/3 divided by 7/3 124/3 times 3/7 124/7 sq yds per gallon which you can change to a mixed number. To find out what Jack is getting you need to multiply the answer above by 9 since 1 sq yard = 9 square...

Math
1 dollar / 1.14euros = ?/25 euros cross multiply to get dollars = 1.14(25) Multiply and you will have dollars. 1000 g = 1 kg you have 500 g = 1/2 kg divide your dollars by 1/2 which is the same thing as multiplying by 2 and you will have dollars/kg

Math
Are you trying to compare this to feet? So you can see if it makes sense for the shark to be 4.9 meters.

Math
Looks right to me because they wanted the ages 10 years ago. Did you use formulas like these? y + m + d = 50 y = d/2 7(y-10) = d -10 You need to work with the last two equations because they have the same variables.

Math
r + g =30 That first equation gives you to total number of balls. This next equation is the number of balls times the weight of each ball. Taking into consideration that the green balls are 49 lbs heavier than the total mass of red balls. 9g = 49 + 8r r + g = 30 or g = 30-r ...

Algebra
If two lines are parallel, then they have the same slope. 6x-2y =13 -2y = -6x +13 y = 3x -13/2 slope m= 3 y-intercept b=-4 y=mx +b can you finish from here?

math
If you are talking about simple interest and not compounding interest then you would just use the formula: A = P+ Prt Where Prt is the interest. 500 x 25 = 12500 A = 12500 + 500(.064)(25) Can you finish from here?

Math
I assume that a system means two equations. That means that you graph each equation on the same x-y axis. You can find the points for each graph by using a table of values or you can use the slope intercept method to draw the graphs.

Chemistry
C3 H7 because you have to use whole numbers.

math
50 boys there would be 30 girls 100 boys there would be 60 150 boys there would 90 girls The above should give you an idea of what the ratio means 125 boys would be 75 girls and a difference of 50 more boys.

Math
If our car uses 0.7 gallon of gas in going 10 miles, how much will it use on a 100 mile trip?

us history
Pensacola is in Florida and New Orleans is in Lousianna. So..I don't agree with east.

Math
Drive is 6 hours 30 min Stop for gas is 10 min Now we have 6 hrs and 40 min. 45 min for lunch so 6 hrs and 85 minutes I hour = 60 minutes so you have 7 hours 20 minutes Can you use this information to figure out when to leave?

Physical Education
I agree.

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.

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 mABC 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 y-axis 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 100-81/100 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 + 14-x - 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 ...

Subject-verb agreement
Hey Damon, I agree with you. Physics is much easier than English :D. So is it C the correct answer?

Subject-verb agreement
which of the following sentences demonstrates proper subject-verb 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(2-x) 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 +4x-60 =1? Hint: There are three cases to consider I think I figured out 2 of the cases. The first one being x2 +4x-60=0 while x2 -5x+5=whatever. The second is x2 -5x+5=1 and x2 +4x-60=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?