Friday

October 28, 2016
Total # Posts: 8,110

**Chemistry**

Base = NaOH, 0.084 M drips 2ml at a time Acid = Phenol, KA=1.3*10^-10 You have 28.0 ml in flask, and it is 0.06 M How would you find the molarity and moles of OC6H5-1

*October 3, 2016*

**Math**

x + x +1 = -11 2x = -12 x = -6 x = -5 product = 30

*October 3, 2016*

**Math**

That means that you have to multiply 11 times itself 2016 times. You would need to use a calculator with 11 ^ 16.

*October 3, 2016*

**Algebra**

distance = rate x time 5 + 40x = 50x 5 = 10x x = 1/2 hr

*October 3, 2016*

**math**

F = 4J F+J>= 55 4J + J >= 55 5J >= 55 J = 11

*October 3, 2016*

**Math**

7 x 3000 and 7 x 4000

*October 3, 2016*

**Algebra**

Tell us what you think and we will check it.

*October 3, 2016*

**MATH**

The forty and the 9th term of an AP is -3 and 12 respectively. Find the common difference and some of the frist 7th term

*October 3, 2016*

**Chemistry**

An Unknown Compound (M=60.09 g/mol) is composed of Carbon, Hydrogen and Oxygen. Combustion of 0.255 g of the unknown compound produces 0.561 g Carbon Dioxide and 0.306 g of Water. Determine the molecular formula of the compound.

*October 3, 2016*

**math**

2) The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?

*October 2, 2016*

**psychology **

According to a survey in the U.S. in the 1990s, people in their 40s reported more lifetime sex partners than did people in their 50s. Which of these is the most likely explanation? a) People in their 50s were starting to lose their memory. b) People in their 40s had been young...

*October 1, 2016*

**psychology **

According to Hans Selye, stress is a) a specific response to a specific demand on the body. b) a cognitive, not physical, response to a threatening situation. c) any reaction that increases activity in the parasympathetic nervous system. d) a nonspecific response of the body ...

*October 1, 2016*

**psychology **

According to Abraham Maslow, what do we do when we have several motivations? A) We alternate between one and the other. B) We try to satisfy them at the same time. C) We are frozen with indecision. D) We start with the lowest need and work up. D Is my answer

*October 1, 2016*

**math**

john hiked 8 1/3 miles in 3 3/4 hours. what was John's average speed for the hike

*September 30, 2016*

**Math**

(3/4)pg/1 min = 3 pg/x cross multiply 3 = 3/4 x x = 4

*September 29, 2016*

**Stats,**

Put the values in order from lowest to highest. 25th percentile will have 1/4 of the data below that number. 90th will have .9 of the data below that nu

*September 29, 2016*

**Algebra**

7 more than 5 times a number is 10. Replace "a number" with something from the real world.

*September 29, 2016*

**STATS**

for anyone one question is .50

*September 29, 2016*

**math**

In a pet store there are 12 kittens for sale and 80 puppies. what is the ratioof the number of puppies to kittens ? write your answer as a fraction and reduce your result . thank you

*September 29, 2016*

**English**

I checked 1-9 and I agree with all of them except for the first one.

*September 28, 2016*

**math**

a^2 + b^2 = c^2 x^2 + 11^2 = 12^2 x^2 +121 =144 x^2 = 23 take the sq rt of 23 to find your answer.

*September 28, 2016*

**Math**

yes.

*September 28, 2016*

**Algebra**

Graph y = -|x -5| Make it a dotted line because the original problem is less than not less than or equal to. Let x=0 y=-5 x = 5 y = 0 x = 4 y = -1 shade

*September 27, 2016*

**adv algebra**

x/5 -3 = x/4 -2 x/5 -x/4 = 1 4x/20 -5x/20 = 1 -x/20 = 1 -x = 20 x = -20

*September 27, 2016*

**science**

Density = mass/volume 56/22 = If the answer is greater than 1 ..the density of water then it will sink.

*September 27, 2016*

**Math**

8 orange/12 selzer or 2/3 divide each part of the fraction by 3 to get per 1 cup of selzer. 2/3 over 3/3 or 2/3 for 1.

*September 27, 2016*

**Math**

A wire of length 24 meter is to be folded in the form of a rectangle. If each side of a rectangle has to be an integer (measured in meters), what is the maximum number of rectangles that can be formed by folding the wire?

*September 27, 2016*

**Algebra**

Pick any two points (0, 17.5) and (3, 35.4) Find the slope (35.4-17.5)/(3-0) 17.9/3=5.96666 or 5.97 y = mx+b 17.5 = b since x=0 y = 5.97x + 17.5 replace x with 15 and find y.

*September 27, 2016*

**Algebra**

Do this one the same way that I did the other one. (5,80) and (12,85)

*September 27, 2016*

**statistics**

An outlier is a value that is much larger than the rest or much smaller than the rest. range is the difference between the largest and the smalleest value. mean = add them all and divide by 30 mode is the value that occurs more than once. median. put all of the data in order ...

*September 27, 2016*

**math**

6200-6300 divided by 400 to get the z-score. Then use the z-table to find the probability of less than you z-score or you could use a stat calculator like at TI-83 or 84 to find the probability. For forty days you have to use 400 divided by the square root of 40 as the ...

*September 26, 2016*

**Statistic **

A recent poll conducted by Gallup Inc. asked the following question: In general, how much trust and confidence to you have in the mass media - such as newspapers, TV, and radio - when it comes to reporting the news fully, accurately, and fairly? A great deal, a fair amount, ...

*September 26, 2016*

**Math**

a ratio is when you put one number over another so I would say the ratio of 3 and 6 would be 3/6 which equals 1/2

*September 26, 2016*

**math**

x + x+2 <= 7+(x+4+x+6)/2 2x+2<= 7+x +5 Can you finish from here?

*September 26, 2016*

**math**

A quick way would be to multiply 1 1/2 times 8 which would give you 12 lbs. So..all you need is 12 lbs and you have 14 4/5. you have enough.

*September 26, 2016*

**Math**

It depends on what the graph looks like or the units that you are using.

*September 26, 2016*

**Math**

You are okay until the 8+8 step 8-8 = 0 5 - 16 =-11

*September 26, 2016*

**Ap Chemistry**

Saccharin has a pKa of 2.32 It has a formula of HNC7H4SO3 If you dissolve 4.6 grams of saccharin in 478 ml of water, what is the resulting pH ?

*September 25, 2016*

**English Check My Answer**

Try saying the sentence aloud with the words in each one. Only one of them makes sense in both.

*September 25, 2016*

**English Check My Answer**

Which word from the following list has meanings that fit both sentences? I’ll start the fire after _______ a match. The workers are ______ for a higher wage. A. Protesting B. Lighting C. Fighting D. Striking A is my choice.

*September 25, 2016*

**Math**

This is a right triangle (BD)^2 = 7^2+8^2 (DC)^2 = 16^2 +8^2 Can you finish from here??

*September 24, 2016*

**Maths**

A= 2R A-800=R-240 2R -800 = R -240 R = 560 A = 1120

*September 24, 2016*

**Algebra**

Multiply the second equation by -4 an add to the first equation. 4x - 6y = 10 -4x-4y= 0 -10y=10 y=-1 find x

*September 24, 2016*

**chemistry**

In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.2×107J. Part A How many kilograms of oil are needed to heat 110 kg of water from 24 ∘C to 100∘C? (Assume that 1lb=454g, the specific heat of liquid ...

*September 23, 2016*

**University South Carolina**

$9000 + $3x =12x solve for x and that will give you the break-even point. One more person will give you the profit.

*September 23, 2016*

**math**

This works just like an equation. Divide both sides by 3. The only difference is if you had -3x<18 you would divide both sides by -3 . Dividing or multiplying by a negative number means you have to switch the direction of the inequality.

*September 23, 2016*

**5th grade math**

insert in parentheses: 14+2=6+2x3+2

*September 23, 2016*

**Math**

Not a. You have to multiply the coefficients - the numbers and you add your exponents. Also,the correct answer only has one number to the left of the decimal point. The answer for the first one is d. I agree with your answer for the last one. Retry the other 2.

*September 22, 2016*

**Math**

You have to make table of the sample space 1,1 1,2 1,3 ... 1,6 2,1...............2,6 3,1................3,6 4,1 5,1 6,1 You should have 36 entries. Given the sum is greater than 3 will eliminate 1,1 1,2 and 2,1 So you are working with 33 possibilities for the denominator The ...

*September 22, 2016*

**Statistics**

Try adding one.

*September 22, 2016*

**Science**

Thanks.

*September 20, 2016*

**Science**

A group of parts that work together is called. A. Technology B. Process. C. System. D. Feedback I think its C?

*September 20, 2016*

**Algebra**

John earns $3 more than hugh. Leslie earns $2 less than twice Hugh. Together they earn $101. How much does Hugh earn?

*September 20, 2016*

**Chemistry**

10. Use the accepted Ksp value of Calcium hydroxide to calculate the following: a. What is the most calcium hydroxide that can be dissolved in 1.0 Liters of de-ionized water? b. What is the most calcium hydroxide that can be dissolved in 125.0 ml of de-ionized water? c. What ...

*September 20, 2016*

**Commom Core Algebra**

Factor out the common x + 2 (x+2)(x+3) Once you factor out(x+2) what is left is just x +3

*September 19, 2016*

**Algebra**

You have to decide which variable to eliminate. Lets choose x. We need the coefficients to be equal and opposite. I will multiply the first equation by 3 and the second equation by -5 15x + 12y =42 -15x -30y = -30 Add the two equations and the x will be eliminated. -18y = 12 y...

*September 19, 2016*

**algebra 1**

Divide both sides by 3 x-2 > -3 add two to both sides x> -1 The rules for inequalites are the same as for equations unless you are multiplying or dividing by a negative number.

*September 19, 2016*

**Physics**

A rocket accelerates upward at 3m/sec2 for 60 seconds when it releases a booster. How long will it take the booster to reach the ground from the highest point and what is its velocity as it is striking the ground? I'm unsure how to find the time if time is already given. I...

*September 19, 2016*

**math**

Simple interest 400(.05)(2) = $40 compound 400(1.05)^2

*September 18, 2016*

**PHYSICS**

32/ft/sec^2 or 9.8 m/sec^2

*September 18, 2016*

**Math**

okay

*September 18, 2016*

**Math**

Is the first one (y-5)/3= 1 multiply by 3 y-5 = 3 add 5 y = 8 6x =-24 divide by 6 so x = 4

*September 18, 2016*

**math**

-4x-4b =p + 8b -4x =p +12b divide by -4 D

*September 18, 2016*

**Math**

1 lb he saves 13.60 then for the other 1/8 he saves 1/8 of 13.60 Divide 13.60 by 8 and then add that answer to 13.60

*September 18, 2016*

**math**

just subtract 1/2 x from both sides r- 1/2 x =y

*September 18, 2016*

**Math**

A = x^2 P = 4x A = 1/2 P x^2 = 2x x^2 -2x =0 (x)(x-2) = 0 x= 0 and x = 2 Ans x=2

*September 18, 2016*

**Math**

are you solving for r or h

*September 18, 2016*

**Mathematics**

Thanks. Forgive my grammar.

*September 18, 2016*

**Mathamatics**

If it has been determined that the probability of an earthquake occurring on a certain day in a certain area is 1 over 20 , what are the odds against an earthquake? Would the answer be 19:1?

*September 18, 2016*

**stats**

The area between -1.75 and 1.75 is equal to .91988 or .92 I would use those z-values. You can get these values from looking at a z-table. There are many different version of z-tables. You might be able to see the tails in it or a cumulative area z-table. Think of 92% being in ...

*September 18, 2016*

**Math**

If we toss four fair coins, what is the probability that we get more heads than tails? HHHH TTTT HHTT TTHH HTHT THTH HHHT TTTH HTTH THHT Would the answer be 2/10? I am a little confused. Thanks for the help!

*September 18, 2016*

**Physics**

A man claims that he can hold onto a 9.0-kg child in a head-on collision as long as he has his seat belt on. Consider this man in a collision in which he is in one of two identical cars each traveling toward the other at 49.0 mi/h relative to the ground. The car in which he ...

*September 18, 2016*

**Physics**

My bad, i switched initial velocity with final velocity in my equation. I actually got 13.82 (13.8 with sig figs). Is my answer still true?

*September 17, 2016*

**Physics**

An automobile accelerates 1.77 m/s2 over 6.00 s to reach freeway speed at the end of the entrance ramp. If the car's final velocity is 24.44 m/s, what is it's initial speed when it began accelerating. the answer i got was 35.06 m/s (35.1 m/s when doing sig figs). I ...

*September 17, 2016*

**Algebra**

y = .05(x-50) +100 If total number of text messages = x

*September 17, 2016*

**math**

A scuba diver dove from the surface of the ocean to an elevation of −99 9 10 feet at a rate of −30.7 feet per minute. After spending 14 minutes at that elevation, the diver ascended to an elevation of −8 9 10 feet. The total time for the dive so far was 21 1 ...

*September 17, 2016*

**linear programming**

Solve the following LP problem graphically MAX 2X + 7Y Subject to: 5X + 9Y >= 90 9X + 8Y <= 144 Y <= 8 X, Y >= 0

*September 16, 2016*

**linear programming**

Solve the following LP problem graphically MAX 2X + 7Y Subject to: 5X + 9Y >= 90 9X + 8Y <= 144 Y <= 8 X, Y >= 0

*September 16, 2016*

**linear programming**

Solve the following LP problem graphically MAX 2X + 7Y Subject to: 5X + 9Y >= 90 9X + 8Y <= 144 Y <= 8 X, Y >= 0

*September 16, 2016*

**linear programming**

Solve the following LP problem graphically MAX 2X + 7Y Subject to: 5X + 9Y >= 90 9X + 8Y <= 144 Y <= 8 X, Y >= 0

*September 16, 2016*

**Math**

seems right to me.

*September 16, 2016*

**math, please double check me**

Using a t-test I agree with -6.37. However, it is significant because -6.37 is a large t-value. I would never use a t-test when dealing with % which are equivalent to proportions. I would have done a 1 proportion z-test... but given the choices that you were given it looks ...

*September 15, 2016*

**Algebra II**

Maria's car averages 44 miles per gallon. Maria wants to determine how far she can drive based on the gallons of gas in her car. Write an equation to determine how far she can drive based on the gallons of gas in her car. What is the rate of change (slope) for Maria's ...

*September 14, 2016*

**Math**

6 sqrt(16) - 2 sqrt(12) 24 - 4 sqrt (3)

*September 13, 2016*

**math**

25/155 = 60/x solve for x show your work

*September 12, 2016*

**Government**

Do you have the answers

*September 12, 2016*

**Physics: Conversions**

Naval Question: MIDN Rabbit recently completed the NAVY PFA last Friday. During the course of CRUSHING the run and setting a new PR of 7:55, he/she performed a total of 1.1 million ft-Ibf of work. 1). Convert 1.1 million ft-Ibf of work to BTUs 2). Assume MIDN Rabbit's ...

*September 11, 2016*

**Exponential Inequalities**

Start with = then we will worry about the inequality. 2/5 raised to the 5x-1 = 25/4 take the log of both sides and then use the law of logs. (5x-1)(log 2/5) = log (25/4) (5x-1) = log(25/4) divided by (log 2/5) simplify that then solve for x by adding 1 to both sides and then ...

*September 11, 2016*

**Algebra**

y =70 + .40x y = 30 + .80x 70 + .40 x < 30 + .80x -.40x < -40 x > 100 When you multiply or divided across an inequality by a negative, you change the direction of the inequality.

*September 11, 2016*

**Math**

17 = k 24 17/24 = k y = 17/24 k

*September 10, 2016*

**Algebra**

Solve for n. Multiply both sides of the equation by 4. 1+ n = 16 subtract 1 from both sides n = 15 check by putting 15 into the original equation to see if both sides reduce to 4.

*September 10, 2016*

**Chemistry**

Your lab partner tells you that he has prepared a solution that contains 1.5 moles of NaOH in 1.5 L of aqueous solution, and therefore that the concentration of NaOH is 1.5 M. (a) Is he correct (b) If not what is the correct concentration

*September 10, 2016*

**Evans **

A school district has 2 teaching positions to fill and there are 8 applicants to choose from. How many different possibilities are there?

*September 10, 2016*

**Math**

Machine A was able to finish copying a set of document in 36 minutes. Machine B was brought in to work together with machine A to finish copying the document in 20 minutes. How long would it take machine B to finish copying the document by itself

*September 9, 2016*

**Algebra HELP PLEASE**

sale price = original - .25(original) or sale price = .75(original) Sale price = 40 - .25(40) or Sale price = .75(40) You should get the same answer using either one of the expressions.

*September 9, 2016*

**Math**

29 - 10 = 19 droughts only 16- 10 = 6 chess only. if you were using a Venn Diagram two circles intersection with the 10 in the intersection 19 in the drought only part of the first circle 6 in the chess only part of the 2nd circle. That will add to 35.

*September 9, 2016*

**Chemistry**

Larry has 250.00 ml of water. The water currently holds the maximum amount of soluble Silver iodide. In a separate container, Larry has 96 ml of a 0.07M solution of sodium carbonate. He wants to precipitate out all of the silver. Of his 96 ml, how much will he have to pour ...

*September 7, 2016*

**math**

where do you put parenthese to make this number sentence true 3x8/4+2=12

*September 7, 2016*

**Math**

7 = x + 10y 8 = x + 15y 1 = 5y y =1/5 x = 5 5 + 1/5 *8 = your answer

*September 4, 2016*

**Math College 115**

43/60 = hours miles/hour 2 divided by 43/60 2 times 60/43 120/43 divide and round to 2 decimal places distance = rate x time distance = (your answer from above) * time

*September 4, 2016*