Wednesday
September 28, 2016

Posts by john

Total # Posts: 7,987

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
B
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
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

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

Math College 115
F = 9/5 C + 32
September 4, 2016

Math
8 increase by the product 2(x-2) 8 + (2(x-2)
September 4, 2016

Math
How many five-card hands chosen from a standard deck contain two hearts and three spades? How do I solve this?
September 4, 2016

MATH
How many five-card hands chosen from a standard deck contain two hearts and three spades?
September 4, 2016

Algebra
x^3 -x^2 + x -1 Factor by grouping x^2(x-1) + 1 (x-1) (x^2+1)(x-1) For the second one x^2 -1 factors to (x-1)(x+1) The LCM (x^2 +1)(x-1)(x+1)
September 2, 2016

algebra 1
I am assuming that you typed this correctly 3(3^5 /9) 3(27) = 81
September 2, 2016

Math
replace the n with 2n -3 times 4^4n +1 In the original problem I am not sure if you have 4^(2n+1) or 4^2n plus 1. if it is the first -3 times (4^(4n_+1) that would be the answer because you cannot multiply the -3 times the 4.
September 2, 2016

math
read it carefully. write down what you know look for key words less than - subtract more than - add twice as much - two times half as much 1/2 Look for the same as or equal to "="
August 30, 2016

maths
1,1 = 1 1,2 = 2 1,3 = 3 1,4 = 4 1,5 = 5 1,6 = 6 do the same for 2 all the way to 6. To do the prob distrib. take the total number of products (should be 36) 1, 1 = 1 happens only once 1/36
August 30, 2016

Math
The numbers 1 - 6 on horizontal There are 2 fives There are 2 sixes There are 2 threes
August 30, 2016

Algebra
multiply everything by 3x (3x)(5x) + 6 -9(3x) = 7x 15x^2 + 6 -27x =7x 15x^2 -34x +6 =0 Use the quadratic to solve.
August 29, 2016

Math
Write an expression for 25 less than double a number n
August 25, 2016

physics
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
August 24, 2016

physics vectors
While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 109 m at an angle θ = 30.0° north of east, and 156 m south. Find the resultant displacement from the cave entrance. The figure below ...
August 24, 2016

physics vectors
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
August 24, 2016

physics vectors
In the figure below, a spider is resting after starting to spin its web. The gravitational force on the spider is 0.158 N on the junction of the three strands of silk. The junction is supported by different tension forces in the two strands above it so that the resultant force...
August 24, 2016

physics vectors
If vector A = (6.00 i -8.00 j) units, vector B = (-8.00 i + 3.00 j) units, and vector C = (25.0 i + 22.0 j) units, determine a and b such that (a vector A + b vector B + vector C= 0.) a=? b=?
August 24, 2016

math
A plane flew due south from a point A, 60°north and 45°east to a point B.The distance covered by the plane was 8000km. Determine the position of B.
August 24, 2016

physics vectors
A snow-covered ski slope makes an angle of θslope = 34.0° with the horizontal. When a ski jumper plummets onto the hill, a parcel of splashed snow is thrown up to a maximum displacement of 1.10 m at θsnow = 24.0° from the vertical in the uphill direction as ...
August 23, 2016

physics vectors
Consider the two vectors A with arrow = 3 i − j and B with arrow = − i − 6 j. Calculate the directions of A with arrow + B with arrow and A with arrow − B with arrow. A with arrow + B with arrow ° (counterclockwise from the +x axis) A with arrow &#...
August 23, 2016

physics
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
August 23, 2016

physics vectors
i don't understand the direction
August 23, 2016

science
While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 109 m at an angle θ = 30.0° north of east, and 156 m south. Find the resultant displacement from the cave entrance. The figure below ...
August 23, 2016

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