# Posts by john

Total # Posts: 8,394

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

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

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

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

-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

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 ...

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.

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 ...

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

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

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

Algebra
C = 2605 + (25005/28)x

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

Math
x = y

itt-tech
In Newtons: 7000 x 9.8

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.

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

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.

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

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

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

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

math
you are right

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 ...

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...

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

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

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.