# Posts by john

Total # Posts: 8,368

**Algebra**

calories = 420t

**maths**

yes11

**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

**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 ...

**Math**

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

**maths**

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

**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

**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

**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.

**Math**

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

**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

**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 ...

**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 ...

**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 ...

**Economics**

Set the two equations = to each other since this is equilibrium. Solve for P. Your answer is correct.

**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)

**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?

**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 ...

**Language Arts**

its walk of two moons i have read it its a good book

**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.

**Geography**

Another word for meeting

**math**

15+ .12x = 18 + .09x .03x = 13 Can you solve it from here? Divide both sides by .03

**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. ...

**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)

**statistics**

z= 4.6-3.5 divided by 1.2

**Algebra**

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

**Math**

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

**Math**

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

**Math**

yes.

**Math**

.25 times 20 or 1/4 times 20

**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

**Math**

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

**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 ...

**Math Plz Explain**

I agree it is C or the 3rd answer.

**algebra 1**

1856 + 113 divided by 5743

**Algebra-Please Help!!!**

I agree.

**Math**

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

**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

**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 ...

**Geometry**

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

**Math**

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

**Social Studies/History**

How awful

**Ms. SUE please check**

someone is using your name

**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.

**Pre-Calc**

I just answered this one below.

**Algebra**

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

**Natural Sciences**

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

**Math**

5/12 times 2/12 with replacement

**math**

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

**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 ...

**Math**

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

**math**

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

**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

**Math**

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

**math**

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

**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.

**Math**

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

**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?

**algebra pls pls help**

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

**Math**

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

**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

**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.

**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

**Maths**

3.10998E14

**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)

**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?

**math**

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

**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...

**life orientation**

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

**Math 3**

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

**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.

**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

**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.

**Math**

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

**Math**

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

**Business math**

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

**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

**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 ??

**science**

Use the penny to determine its hardness.

**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

**Math Please Help ASAP**

m^2 - 7

**Algebra 2**

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

**algebra**

290 because the 4 is less than 5.

**Math**

900 + 180 + 13

**MATH HELP ASAP**

For 1-4, cannot see the graphs. 5. To find the slope choose any two points (0,-4) (1, -3) change in y divided by change in x -4 - (-3) divided by (0-1) -1 / -1 = 1 Now, can you do 6?

**math**

a) 280 -250 divided by z = 1.2 Use a z- table to find the probability greater than z = 1.2

**Physics**

Suppose that two concentric rings, each with equal mass per unit length are joined so that they rotate together. Find the moment of inertia.

**math**

Just like you would multiply 2345 x 5679 Just multiply and when you are done put a decimal point two places from the left because there are two decimal places in the problem.

**Math**

To reach the ground, the height would be zero. 0 = -5t^2 + 35t - 2 You need to use the quadratic equation to solve for t, because this is not factorable. b) Time up = time down c) -b/2a will give you the max. height. -35/-10 = 3.5 meters -

**algebra PLEASE HELP ASAP**

4 red out of a total of 16 4/16 of a red You replace the red so you still have 16 7/16 chance of a blue AND means both events have to happen to you multiply the two fractions. 2) there is no replacement. Getting the same is the same as in #1 But... getting the blue is now 7/15...

**algebra PLEASE HELP ASAP**

a) the number of pink divided by the total number of pink and brown. b) the number of brown divided by the total number of pink and brown.

**math help me asap**

12! means 12 factorial that means 12 times 11 times 10 times 9 times 8 times 7 times 6 times 5 times 4 times 3 times 2 times 1. 4! is 4 times 3 times 2 times 1 8! is 8 times 7 times......all the way down to 1. Most people do this math using a calculator with a factorial key. ...

**Math**

x = -6 and x = 3 so x+6 = 0 and x -3 =0 (x+6)(x-3) = 0 0 = x^2 +3x -18 This will open up. 0 = -x^2 - 3x +18 This will open down. You can set this equal to y now. If you work backwards. Factor out the negative 1, factor the trinomial, you will can solve it and find the roots of...

**math**

the problem says the roof rises that is the 8 over a distance of 12 8/12

**math**

The is the same as the one I just answered, but with different numbers. Can you do it? rise/run.

**math**

pitch is rise divided by run 6/27 reduce this answer.

**algebra PLEASE HELP ASAP**

1) It is 1/3 of 90 2) 8! divided by 5! 3) is a combination 12! divide by (4!8!) 4) I agree with you 5) I agree with you.

**Math**

Since both = y, they must = each other x^2 + 2x = 3x + 20 x^2 -x -20 = 0 Now, factor: (x-5)(x+4) = 0 Can you find the values of x?

**Math**

Honor calculus students.. I think it would be skewed. More higher scores than lower scores. I don't think there would be much variation. What do you think?

**algebra PLEASE HELP ASAP**

1) I agree 2) 8/43 times 12/43 3) I am not sure what the question is asking. There is a weird symbol. 4) no replacement 5/14 times 3/13