Wednesday

February 22, 2017
Total # Posts: 8,243

**Math**

36 km/hr times 1 hr/3600 sec I used 3600 because there are 60 min in 1 hour and 60 sec in 1 min. 36 km/3600 sec times 10 sec 360/3600 = he would be 1/10 or .1 km The tortoise takes 2 hours to go 1 km rate is .5 km/ hour chance to kim/sec .5/3600 tortoise'rate He has to ...

*June 12, 2016*

**Math**

(72 +x)/2 =81 Multiply both sides by 2 and subtract 72 to get ... 81(2)-72

*June 11, 2016*

**science**

KE = 1/2 mv^2 1/2 his mass times velocity squared.

*June 11, 2016*

**Math**

What?

*June 9, 2016*

**Math**

Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and intercepts. Part 2. Show ...

*June 9, 2016*

**Science**

d = rt d = 100 times 64 answer is in km.

*June 9, 2016*

**mathematics**

That is the answer, but your teacher might not want to see the word "squared" written. I just did that for you for clarity.

*June 9, 2016*

**mathematics**

Your teacher wants you to check that (x − y)^2 = x^2 − 2xy + y^2 We showed that 900= 900 It was a lot of work, but proved the equation works.

*June 9, 2016*

**mathematics**

30 squared = 900 Now, look at the other side of the equation. 40 squared = 1600 2(40)(10) = 800 10 squared = 100 1600 - 800 + 100 = 900

*June 9, 2016*

**mathematics**

30 40-10 (40-10)^2 = 40^2 -2(40)(10) + 10^2 Can you finish from here?

*June 9, 2016*

**Math**

I agree with D.

*June 9, 2016*

**Pre-Cal: Domain**

The denominator cannot = 0 For f(x) x cannot = 0 for g(x) x cannot = -7 1) If you add the two fractions together, the denominator will be x(x+7) Domain would be from (-infinity, -7)U(-7,0)U(0,infinity) Using ( ) because those values aren't included in the domain. 3) you ...

*June 9, 2016*

**basic science**

work = force x distance Multiply the two values.

*June 9, 2016*

**math/algebra**

ratio (2(lw+wh+lh)/lwh

*June 9, 2016*

**physics**

A large aquarium has viewing ports so people can watch dolphins swim by. What is the net force on a rectangular window, 2.30 m wide and 1.20 m high, if the top of the window is 4.50 m below the surface of the water?

*June 9, 2016*

**Math**

5 times 24 divided by 6.

*June 8, 2016*

**Biostatics**

45-48 divided by 3 -1 = z score find z< -1 use a z-table or a calculator to find the p-value which is 15.9%

*June 8, 2016*

**Science**

change in y / change in x (2--4)/(3-1) or (2+4)/(3-1) 6/2 = 3 that is the slope of the line. Now, you can find the equation y -2 = 2(x-3) simplify and finish. Leave your answer in ax+by = c or y = mx+b form.

*June 7, 2016*

**Math (Circle Equations)**

I agree. I would just write 2^2 as 4.

*June 7, 2016*

**Math help plz??**

I'm not right, I'm just so ugly, I want to ruin other students life's. So plz, I'm just the worst!!!!!!!!!

*June 7, 2016*

**th help plz??**

(3.54 x 10^7) divided by (3.00 x 10^8) divide 3.54 by 3.00 = 1.18 10^7-8 = 10^-1 1.18 x 10^-1

*June 7, 2016*

**Pre-Calculus**

With linear programming, you have to graph each of the equations. x<=y also is needed along with your other equations. Shade in the correct area for the inequalities and look at your intersection points.

*June 7, 2016*

**math143**

Are you looking for the x and the y intercepts? if so, let x = 0 and solve for y let y = 0 and solve for x. 4y = 18 -5x = 18 Can you finish from here?

*June 7, 2016*

**math143**

Find the way intercepts for 4y-5x=18

*June 7, 2016*

**math143**

A. Substitute those values into the equation, simplify does the left side = -167 b. again, put both values into the equation. Does the left side = 51, if so.. it is a point on the graph. to find the y intercept. Let x = 0 and solve for y.

*June 7, 2016*

**math143**

2x3-4x2+23=y A.is(-4,-167) a solution? Show/explain b.is(3,51) a point on the graph c.give the y-intercept

*June 7, 2016*

**physics**

what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork

*June 4, 2016*

**Math**

Two boats leave the same place at the same time. The first sails in a straight line N70°W at 45 miles per hour and the second goes in a straight line S23°E at 57 miles per hour. After 1 hour, how far apart are the boats, to the nearest tenth of a mile?

*June 4, 2016*

**math**

You need to subtract 144 from each side and not add it. So.. I still agree with your answer.

*June 3, 2016*

**math**

I agree.

*June 3, 2016*

**statistics**

(100-110)/25 = z = -.4 (110-110)/25 = z = 0 you want to find the probability between -.4 and 0 you can look this up using a z-table or a calculator. I go .155 See if you agree.

*June 3, 2016*

**math**

Hi, I posted a question yesterday. How do I get to see if someone answered? Thanks, John

*June 3, 2016*

**math**

what is the current value of a pension of $ 200.00 per month for the next 15 years?

*June 3, 2016*

**Math**

Start with the idea that there are 180 degrees in a triangle and that angles w and x are supplementary which means they sum to 180 180 = w + x 180 = x + y + z Can you finish it now?

*June 2, 2016*

**math**

m = -14 -.4 divided by -5 -4 -14/4/-9 14.4/9 = m y+14 = (14.4/9)(x+5) the equation will be in y=mx + b form and you can change it to Ax+By =C

*June 1, 2016*

**math**

2) 8 fours out of 20 8/20 = 2/5 = .4 3) A part of the question is missing. 4) .15 times 20 will get your answer. 5) .2 times 50 6) 5/600 times 24000 7) I agree 8) 4/10 times 3/10

*June 1, 2016*

**math**

1) I am getting 30/50 for P(not red) so I disagree with your answer. 9) Write out your table: HHH HHT HTT HTH THH THT TTH TTT It looks like HHH and HTH appear once each. 10) 1/2 chance of a heads 4/6 to get a number less than 5 multiple the two to get 4/12 or 2/3

*June 1, 2016*

**math**

Sara is lining a square tray with 1inch tiles. The side length of the tray is 9inches. How many tiles does Sara need?

*May 31, 2016*

**physics**

You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is barely audible at your location, which of the following could be the wavelength of the sound?

*May 31, 2016*

**probability**

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 You have 21 numbers Which of these numbers are divisible by 5 or 3 5,6,12,15,18,20,21,24,25 9/21 or a decimal if your teacher requires that format. b) count up the even numbers and the prime numbers. Prime numbers are ...

*May 31, 2016*

**math**

RS = AB x = 2x + 7 x = -7

*May 29, 2016*

**Algebra Help**

Graph c should have a line that is slanting downward from left to right. y = -3x + 2 or 3x + y = 2 It should cross the y-axis at (0,2) It should cross the x-axis at (2/3, 0) Hope this helps.

*May 27, 2016*

**Algebra**

9 times 10^4 multiplied 8 times 10^6 multiply 9 times 8 = 72 with exponents you keep the base and add the exponents. 72 times 10^10 sci notation calls for one decimal place only 7.2 times 10^11 You have your exponent right, but didn't multiply the coefficients.

*May 27, 2016*

**math**

alright thanks

*May 26, 2016*

**math**

A line connecting the points (x, 12) and (12, 9) has a slope 1.4. Determine X. a. 9 b. 10 c. 7 d. 8 Steepest slope? a. 0.4 b. undefined c. 0.1 d. -1 over 7 Flattest slope? a. 7 over 9 b. 0 (THIS ONE) c. undefined d. 2 over 3

*May 26, 2016*

**Math ms sue??? (Check my answers????)**

Ok i figured out some that i got wrong but i'll that

*May 26, 2016*

**Math ms sue??? (Check my answers????)**

You don't know if I got any right?

*May 26, 2016*

**Math ms sue??? (Check my answers????)**

1) What would the slope be for a road that has a rise of 11m and a run of 100m? a. 22 over 100 b. 11 over 100 (THS ONE) c. 15 over 100 d. 30 over 100 2) What would the slope be for a road that has a rise of 5m and a run of 100m? a. 0.05 (THIS ONE) b. 0.25 c. 0.16 d. 0.02 3) ...

*May 26, 2016*

**math grade 9**

only 1 out of the 11?

*May 26, 2016*

**math grade 9**

can someone check over my answers and correct them? *over means fraction 1) What would the slope be for a road that has a rise of 11m and a run of 100m? a. 22 over 100 b. 11 over 100 (THS ONE) c. 15 over 100 d. 30 over 100 2) What would the slope be for a road that has a rise ...

*May 26, 2016*

**algebra 1**

$300 is what they will take in. How much is the prize? I need that to find expected value for Raul. The fair price of a ticket depends on the pay out.

*May 25, 2016*

**algebra**

You need a VENN diagram to answer this question with circles for mysteries, sci fi and romance. They will all intersect and there will be a triple intersection in the middle with "3" Then you work back to the double intersections... subtracting 3 from each of those. ...

*May 25, 2016*

**math**

A picture is copied onto a sheet of paper 8 inches by 10 inches. A 2-inch margin is left all around the picture. Find the length, width, and area of the picture. Length = 10 inches Width = 8 inches Area = 80 inches squared am i right?

*May 25, 2016*

**Algebra II**

one leg is 5 sqrt 3 the other leg is x the hypotenuse is x + 2 c^2 = a^2 + b^2 (x+2)^2 = x^2 + (5 rt3)^2 x^2 + 4x + 4 = x^2 + 75 4x + 4 =75 because the x^2 cancel. Can you solve from here

*May 25, 2016*

**Algebra II**

.60 less than 75000 .40 more .65 air condition .30 air .60 times .65 low and air .65 + .30 have working air

*May 25, 2016*

**Algerbra**

You really need to know how to do the problems. Copying answers doesn't help you at all in the end.

*May 25, 2016*

**math**

104 + .22(104) 120 -.25(120)

*May 25, 2016*

**Please help me with this math**

-3x + 5 <or = -22 Subtract 5 from both sides. Divide both sides by -3 When you divide by a negative, you have to switch the inequality which will give you > or equal to

*May 25, 2016*

**Math- Prob Stat**

p=.35 q =.65 .35^5 times .65^11 =_____ then you have to multiply that answer by the combination that gets you 16!/11!5! you do that because there are many ways to get those 5 people. It could be the first 5, the last 5, the middle 5 or any possible. b) .35^11 times .65^5 and ...

*May 25, 2016*

**Math**

To be even, you have to be divisible by 2. x/2 + y/2 =( x + y)/2 even numbers have a difference of 2. n + n + 2 = 2n +2 which is divisible by 2 or something like n+2 + n+4 = 2n+6 again divisible by 2.

*May 25, 2016*

**Math**

tan 60deg = y/x y/x =1.7325 tan 30 deg = y/(x + 6) = .577 x = shadow and y = pole y = 1.7325x y = .577(x +6) Since they both equal y, you can say.. 1.7325x = .577x + 3.462 Solve for x to get the shadow for the 60 degrees. Find y, by putting this answer into both equations. If ...

*May 25, 2016*

**Math**

16 =k2 as one increases, the other increases. As one decreases, the other decreases. k = 8 y=8x

*May 25, 2016*

**Math**

f(x) = x + 2 the higher number you put in the higher answer you get. Think about x = 2 vs. x = 200

*May 25, 2016*

**Statistics**

.12 times .96 false positive times % who don't have the disease.

*May 25, 2016*

**Algebra**

C = 2605 + (25005/28)x

*May 24, 2016*

**science**

Net force is 5 because one side is pushing by 5 more newtons.

*May 24, 2016*

**Math**

x = y

*May 24, 2016*

**itt-tech**

In Newtons: 7000 x 9.8

*May 24, 2016*

**Algebra**

For lines to be parallel, they have to have the same slope. (7 - (-2))/ 5 -7 9/-2 = m (1,3) Use the slope and the point to find the equation. There are many ways to do this. One is called the point slope formula: y - 3 = (-9/2)(x -1) simplify and solve for y.

*May 24, 2016*

**algebra**

8000(1+.03)^4 Raise 1.03 to the 4th power and then multiply times $8000.

*May 24, 2016*

**Algebra**

If two lines are perpendicular their slopes or gradients are negative reciprocals of each other: 5 -1/5 -4 1/4 1/2 -2 do you see the idea? Also the two gradients will multiply to equal -1. You can use that as a check.

*May 24, 2016*

**Financial Math**

4 numbers 2 letters (0-9) (26) (10^4)(26^2)

*May 24, 2016*

**math**

It depreciates $2500 per year. After it is x years old, it has depreciated 2500x.

*May 24, 2016*

**CHECK MY WORLD HISTORY ANSWERS**

5 is glass ceiling 9 native treaty rights All the others are correct.

*May 24, 2016*

**MATHS**

Not if the first is a negative. -5 and 7 =2 -1/2 + 3/4 = -2/4+3/4= 1/4 2 1/4

*May 24, 2016*

**math**

you are right

*May 24, 2016*

**math**

You normally would use a calculator or a table to look up the tan of a specific angle. This problem is asking for you to do it backwards. You have the tangent value and need to find the angle. On the calculator it is noted as tan^-1 or the inverse of tangent. I got 85.236 ...

*May 24, 2016*

**Math**

10 Put the data in order 6 7 10 12 13 15 17 20 Median is 12.5 Quartiles are 1/2 way between the median and the ends of the data. The first quartile is between 7 and 10 so that is 17/2 = 8.5 The third quartile is between 15 and 17 which is 16. The interquartile range is 16-8.5...

*May 24, 2016*

**Algebra**

calories = 420t

*May 24, 2016*

**maths**

yes11

*May 24, 2016*

**MATHS**

.8x = 120.00 .87x = 112.00 This represents an easier way to do the problem if there is 20% off that means you are paying 80% of the original cost. You are paying 87% if it is 13% off. To find the price at nine-irons divide 112 by .87

*May 24, 2016*

**maths**

x is positive and z is negative x has a larger absolute value xy = z solve for y, y = z/x y = a negative fraction because x is larger than z. let's say the answer is -1/2 that would be a possibility given the facts. y = -1/2 |y| = |-1/2| so |y| = 1/2 since that number is ...

*May 24, 2016*

**Math**

If you divide the other way 23.76/9.9 you will get 1:2.4

*May 24, 2016*

**maths**

(b, y) twice as much blue as yello (2, 1) (4, 2) (6, 3)

*May 24, 2016*

**Math**

Find the probability of each event. Spinning red on a spinner with equally sized red, blue, yellow, and green sectors, and flipping a coin that lands tails up

*May 23, 2016*

**astronomy**

After 1 half-life 50% should be gone. only 17% is gone, so this is just a portion of 1 half-life. 17/50 = .34 half-life 5730 times .34 should be your answer

*May 23, 2016*

**math**

I answered this when you posted it yesterday. You are correct it is c. However, you just guessed at an answer and you can't have -8 dogs. You would have to use the formula d + c =36 and equation c to get the exact answer.

*May 23, 2016*

**Math**

I just answered this below with quite a bit of detail.

*May 22, 2016*

**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*