# Posts by John

Total # Posts: 8,289

**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*

**Math**

I would be happy to check your answers. Remember when multiplying you multiply the coefficients and add the exponents. 4x^3 x 5x^4 = 20x^7 for 18 and 19 you will use the distributive property. Multiply what is in front times each term inside the ( ) use the rule stated above. ...

*May 18, 2016*

**statistics**

You can find this by using a z-table. The .278 is in the body, find the value for c by using the margins. or you can use a graphing calculator. 2nd vars invNorm(.278)

*May 18, 2016*

**statistics**

z= 4.6-3.5 divided by 1.2

*May 18, 2016*

**Algebra**

6/10 =60% or the 60th percentile.

*May 18, 2016*

**Math**

7/50 = ?? Multiply that answer times 100o to find about how many are defective each day.

*May 18, 2016*

**Math**

This like the other problem. Multiply the percent times 300.

*May 18, 2016*

**Math**

yes.

*May 18, 2016*

**Math**

.25 times 20 or 1/4 times 20

*May 18, 2016*

**Math**

I think you are taking 1 marble from a barrel that contains the ones you have stated. Right? there are 16 marbles 14 are not yellow 14/16 = 7/8

*May 18, 2016*

**Math**

It is the last one becasue of the term "healthy" they are trhying to lead you toward whole-wheat.

*May 18, 2016*

**math**

You need to get a common denominator first. since 3 and 4 go into 12, I would use 12. Wait a minute is 57 supposed to be 5/7? If so, we need a different denominator. If not... 1/3 becomes 4/12 1/4 becomes 3/12 2/3 becomes 8/12 Now, order them from lowest to highest using the ...

*May 18, 2016*

**Math Plz Explain**

I agree it is C or the 3rd answer.

*May 18, 2016*

**algebra 1**

1856 + 113 divided by 5743

*May 17, 2016*

**Algebra-Please Help!!!**

I agree.

*May 17, 2016*

**Math**

Area = base times height 4.55 = 3.25 h 4.55/3.55 = h Can you finish from here?

*May 17, 2016*

**math**

2 times 1 times 10 first digit is 6 or 7 so that is 2 second digit is 1 so that is 1 choice 3rd digit could be 1-9 that is 10 choices

*May 17, 2016*

**Math**

In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 95% confident that your sample mean is within 11 minutes of the population mean? Assume that the standard ...

*May 17, 2016*

**Geometry**

sin 75 degrees = x/12 find the sin of 75 and multiply by 12

*May 16, 2016*

**Math**

yes.. one variable is data managmeent and the other is grade 12.

*May 16, 2016*

**Social Studies/History**

How awful

*May 16, 2016*

**Ms. SUE please check**

someone is using your name

*May 16, 2016*

**Pre-Calculus**

Try it and see f o g = f((g(x)) = a(cx +d)+b g o f = g(f(x)) = c(ax + b) +d Simplify.. it doesn't look like they are the same.

*May 16, 2016*

**Pre-Calc**

I just answered this one below.

*May 16, 2016*

**Algebra**

If you give your answers, we will be happy to check them for you.

*May 16, 2016*

**Natural Sciences**

If you have the formula correct, then it looks like 1 Sulfur and 3 Oxygen

*May 16, 2016*

**Math**

5/12 times 2/12 with replacement

*May 16, 2016*

**math**

If it is simple interest, the formula is I=Prt time is in years so 60/12 = 5 year I/Pt = r

*May 16, 2016*

**math**

You have to use a random number table to choose 5 random numbers. Do this at least 10 times. You might get numbers like 57014 in this case 7 represents arrives late. the next number might be 03698 in this case 8 and 9 represents arrive late so you have 2 After you finish the ...

*May 16, 2016*

**Math**

1 - (1/5 + 1/10 +1/4) 1- (4/20 + 2/20 + 5/20) 1/5 (8400) spent on rental

*May 15, 2016*

**math**

10/5 = 8/m 2 = 8/m m = 4km/hr

*May 15, 2016*

**Math**

1/5 x + 3/8(4/5 x) x - 1/5 x - 3/8 (4/5 x) = 12.00 x - 1/5 x - 3/10 x = 12.00 10/10 x - 2/10 x - 3/10 x = 12 5/10 x = 12 x = 24 1/5 (24) = $ 4.80 on book 3/8 (19.80) =7.20 check 24 - 4.80 - 7.20 = 12

*May 15, 2016*

**Math**

45/ 90 = 120/x 1/2 = 120/x x = 240

*May 15, 2016*

**math**

$1.00 is 100 cents I just moved the decimal place two places to the right.

*May 13, 2016*

**maths**

A. no because there are only 3 blue B. highly unlikely since there is only 1 red C. You could get exactly 3 green since there are 10 green D. There cannot be more red removed since there is only 1.

*May 13, 2016*

**Math**

12!-(11!x2) = 399168000 is what i got

*May 13, 2016*

**Math**

There are 12 students to be seated in a row of 12 chairs. Paul and Martha have broken up and will not sit together. How many different seating arrangements are possible?

*May 13, 2016*

**algebra pls pls help**

x = =-b/2a b = -16 so -b = 16 a = 4 x= 16/8 = 2 Find y by substituting

*May 12, 2016*

**Math**

cos 20 they are the same because they are complementary angles. 70 + 20 = 90 80 + 10 = 90

*May 12, 2016*

**N.H.H**

x = # of $5 y = # of $1 x + y = 14 5x+ y = 26 -x-y = -14 5x + y = 26 4x = 12 x = 3 y = 11

*May 12, 2016*

**Pre Calculus**

The following table shows the rate of water flow (in L/min) through a dam. t (min) 1 5 9 13 17 21 25 V'(t) (L/min) 6 6 2 2 3 6 2 Approximate the total volume of water that passed through the dam from t=1 to t=25 using Simpson's rule, with n=6.

*May 12, 2016*

**math**

Which equation matches the following description?James loves making smores when he goes camping with his family.He puts half a chocolate bar on every smore.The number of chocolate bars,c,James needs is dependent on the number of smores,s,he wants to make. c=2s c=1/2s S=2c s=1/2c

*May 11, 2016*

**Maths**

3.10998E14

*May 11, 2016*

**Physics**

How high will an arrow travel into the air when shot upwards? Bow stress: 68 J Arrow: 26 g (there is no air resistance)

*May 11, 2016*

**math**

a 14 foot ladder placed against a vertical wall of a building with the bottom of the ladder standing on level ground 9 feet from the base of the building. how high up the wall does the ladder reach?

*May 10, 2016*

**math**

Describe Sam´s location relative to the theater. Ordered pairs:Sam (4,2),Theater:(-3,5)

*May 10, 2016*

**Maths**

If Rick has $500 In his account after 4 years investing at 2.5% per year , how much money did he deposit initially ? Use =A =P (1+ r/n) 2). Your new laptop cost $1500 but depreciates in value by about 21% each year. a) How,much will your laptop be worth in 6 years ? Use A= Pe...

*May 6, 2016*

**life orientation**

Do a google search and I bet you will find a lot of examples.

*May 6, 2016*

**Math 3**

4 * 10^4 2 times 4= 8 subtract exponents 6-2 = 4

*May 6, 2016*

**Math**

E + E = O 1 + 1 = 2 2 3 1 ONE 2 3 1 ONE 4 6 2 TWO This is one possible solution, but there may be others.

*May 6, 2016*

**MATH HELP PLEASE**

1 -3 are correct. #4 anything raised to the zero power = 1 5 = 6) -16r^2 -10r 7) b multiply the coefficients and add the exponents. 8) d

*May 6, 2016*

**Math**

red = 95 blue = 5 x green red + green = blue -189 replace with what we know from above. 95 + green = 5 x green - 189 95 + g = 5g -189 194 = 6g divide by 6 to find number of green. Multiply that number times 5 to get the number of blue marbles.

*May 6, 2016*

**Math**

If y=8 when x=4,find y when x=5

*May 5, 2016*

**Math**

120 times 400 + 119.75 times 100 I think they may be including the extra 100 chairs.

*May 5, 2016*

**Business math**

8.50 + 11 (24) = 272.50 The total price Carrying charges 72.50 divide $11 into 200

*May 5, 2016*

**Math**

Monday 1/3 read means 2/3 unread Tuesday reads 3/10 of 2/3 He has 1/5 of the book left = 35 multiply 5 times 35 to get your answer. 1

*May 5, 2016*

**trigonometry**

from a second-storey window directly across the street. the angle of elevation of the top of an office building is 67 degre 30 mins. and the angle of depression of the base 18 degre 20 mins. if the building are 38 meter apart. wat is the height of the building ??

*May 5, 2016*

**science**

Use the penny to determine its hardness.

*May 5, 2016*

**Math**

Use Simpson's Rule and all the data in the following table to estimate the value of the integral b=-5 a=-11 x= -11 -10 -9 -8 -7 -6 -5 y= 6 -9 -3 -9 -1 -9 -1

*May 4, 2016*

**Math Please Help ASAP**

m^2 - 7

*May 4, 2016*

**Algebra 2**

I agree with your first two answers. Do you have an answer for the 3rd one?

*May 4, 2016*

**algebra**

290 because the 4 is less than 5.

*May 4, 2016*