# Posts by Jack

Total # Posts: 1,833

**math**

1-writing to explain- why might you need to measure a perimeter with a measuring tape instead of a ruler? 2-how are a ruler, a yardstick , and a measuring tape the same? how are they different?

**3 grade english**

thank you very much

**math**

my uncle said 85 meter come in answer

**math**

A park has the shape of a trapezoid. Two of the sides are 25 meters long. The other two sides are 40 meters and 20 meters long. What is the perimeter of the park my answer is 110 meters

**Maths- Trigonometry**

4. A,B and C are points on a horizontal plane. A is 75 m from C on a bearing of 210 degrees and the bearing of B from C is 120 degrees. The bearing of B from A is 075 degrees. From A the angle of elevation of the top T of a vertical towel at C is 42 degrees. Find a. the ...

**english**

Ms. Sue help me last night and then i write again something then nobody help me

**english**

i just wanted to know how did you do # 9 because in the word their no SM word is only wr,kn,st,mb,and gn their no word like SM so please check again and i make (#9 GNASH) i just want to which i did it right or not rest of all correct yes or no

**english**

i don't #5

**english**

1-write wrote written 2-knight knob knit 3-listen wrestler whistle 4-thump comp plumber 5-gnaw 6-wreath 7-doorknob 8-plumber 9-knash 10-thimble 11-whistle 12-starled 13-crumb 14-wrinkle 15-knock

**english**

consonant patterns wr,kn,st,mb,gn directions read each word and idenify the consonant pattern with the silent letter. on the lines,write two more words that have the same silent consonant pattern. underline the consonant pattern in each word you write. 1- write _______ ...

**math**

a rectangle has a length of 5 yards and a width of 3 yards. what is its perimeter? explain your answer.

**history**

could you please give me any information about houses in hot dry countries

**Math**

What is the function rule for 0,31 1,27 2,23 3,19

**math**

I have no idea

**physics**

If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 25.7 ?

**maths**

10 pencils in each packet 46 pencils how many packets are needed

**statistics**

1.25

**ASHFORD**

Identify two distinct fallacies you see committed in the media.

**Algebra 2**

2^(3x+1)=2^)2/x) I don't know what to do here to get both of the xs

**chem**

Balance the equation and answer in terms of moles. Chlorine gas can be produced commercially by passing an electric current through a con-centrated solution of sodium chloride (brine). The unbalanced equation is NaCl(aq) + H2O(`) ! NaOH(aq) + Cl2(g) + H2(g) . If the brine ...

**Math**

Addition But When it's [ (x)^2 ] ^1/2 you can put a negative value under the square in this case besides that you change the powers ex : (-8)^2/3 that means [ (-8)^2 ] ^1/3 and you can write it as [ (-8)^1/3 ] ^2 * for (^1/3) you can put a negative value the answer in both...

**Math**

+ h^20 Explanation : [(x)^a]^b = (x)^(a)(b) = (x)^ab But Be Careful when it's like [ (x)^(1/2) ] ^2 where (^1/2) is the square root and you can't put a negative value under a square root

**Calculus**

any constant 1 , 0 , 2 , pi , square root its derivative = 0 so dy/dx x^2+y^2= sqrt(5) 2 x x' + 2 y y' = 0 [x' = 1] 2x + 2yy'=0 ] /2 x + yy' = 0 y' = - x/y

**Calculus**

1) you find y' (dy/dx) (f'(x)) 2) replace each x by a which equal to one f(x) = (x+1)^1/2 f'(x) = 1/2 (x+1)^-1/2 (1) f'(x) = 1 / 2(x+1) f'(0) = 1/ 2(0+1) = 1/2 = 0.5

**algebra**

i think you mean x^2 - 7x - 8 = (x-8)(x+1)

**Calculus (Antiderivatives)**

((x-2)(x+2) / (x-2) ] / (x-2) int x+2 = 1/2 x^2 + 2x + c

**Calculus**

f'(x) = 6x - 5 / 2 sqrt(3x^2-5x+7) f'(2) = 12 - 5 / 2 sqrt ( 12-10+7) = 7 / 2 sqrt (9) = 7/ 2*3 = 7/6 = 1.16666

**math**

The plane is at least 500 miles closer to chicago than to denver

**Mathematics**

It's still really confusing. >o< My type of problems: **8x(squared)/35y(squared)/x(squared)+4x+3/x(squared)-1 **4a(squared)/ab/a(squared)-5a+6/a(squared)-2a **1+1/a / 1-1/a

**Mathematics**

Can someone explain to me how to solve complex fractions as if I didn't know anything about Algebra? I really need the help, thanks. :) It's not like this is the question of my homework, I just don't understand how to solve complex fractions from the start . . .

**Calculus**

Find dy/dx for f(x)= (1+x)^(1/x)

**Calculus**

Find dy/dx for (e^xy)+ x^2 +y^2=10

**Calculus**

Find the inflection points of f(x)=(x^2-6x-5)e^x

**Calculus**

Integrate from e^2 to e of tthis funtion: 1/(x)ln(x) dx

**Calculus**

Find integral of (x^3-6x-20)/(x+5) dx

**Calculus**

Find the relative extrema of f(x)= x/ln(x)

**Calculus**

The rate at which iPads are sold is R(t)=1000000x2.8^t where the units of R(t) are millions/year and represents time in years such that the year 2010 (Jan 1 2010 through Dec 31 2010) corresponds to t=0. How many iPads will be sold in the three year period Jan 1, 2012 through ...

**math**

it takes a skier 30 seconds to ski down the 1st mountain to the second mountain that is 40 feet above ground. it takes the skier 6 seconds per foot to slide down. how many feet above ground is the 1st mountain?

**statistics**

.096

**math**

The sum of two numbers is 10.The sum of their squares is 52.Find the numbers.

**Math**

Find two consecutive positive integers such that the square of the smaller increased by 4 times the larger is 64.

**french**

can anyone unscramble the letters please.... rtepasn, ipocne, liflmae

**math problem solving**

Alana has 7 children and brought a $9.95 shirt for each of them. The cashier charged her an additional $13.07 in sales tax. She left the store with $7.28. How much money did Alana start with?

**physics**

Car: a(t)=0.5 v(t)=0.5t s(t)=0.25t^2 all of this information is found from taking the integral of 0.5 and since the integral of the acceleration function is v(t)=0.5t+v(initial) we just substitute the initial velocity with 0 because it's 0. Same thing with initial the ...

**maths**

the perimeter of a rectangle is 12 c.m and its length is 4 c.m . what is its width? and the area?

**maths**

the area of a rectangle is 12 square c.m and its length is 4 c.m what is its width?

**maths**

what is the area of a rectangle of length 6 c.m and width 3 c.m ? what is its perimeter/

**maths**

a owns a rectangularers compound of length 40 meters and width 25 meters what is the area of this compound in ares

**Math**

Evaluate the given indefinite integrals. ∫ (x+2)(2x+3)^1/2

**math**

I used a program to draw a circle inside a triangle using height = 3 radius and it was fit !

**math**

Prove that the least height (h) of a triangle contains a circle of radius (r) is h=3r

**Math**

How do you solve 2(15a-3)=10a-46

**math**

a * b = 30 .....1 a - b = 7 ..... 2 a = 7 + b ......3 (7+b)(b)=30 b^2+7b-30=0 (using quadratic formula) b = -10 or b = 3 a = -3 or a = 10

**Thermodynamics**

Determine the units of viscosity,m, in the following equation: t=m(du/dy), where t is a shear stress, u a velocity, and y is a distance in (a) the Engineering English system, and (b) the SI system.

**UOP**

o test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in ...

**math**

Hi would you please show how to know if the function is differentiable or not ? please show me the answer with examples

**math**

Hi I Have A Question About Rolle's Theorem Why We cant solve [ F(x) = abs(x) ] ? *abs = absolute

**Finance**

A court has ordered Security Enterprises to pay 200000 in two years and 500000 in five years. In order to meet this important liability, they wish to invest in a combination of two-year 10% par-value bonds with annual coupons and five-year zero-coupon bonds. Each of these is ...

**geometry**

1. a 2. d 3. d 4. b 5. d The final score is 5/5 (100%). I know it is correct because I got them all right. I hope that helps. :)

**Math**

thanks

**Math**

Find the equation of the diameter of the circle x^2+y^2-6x+2y=15, which, when produced, passes through the point (8,-2).

**chemistry**

An analytical chemist determines that an unknown sample contains 0.3452 mol of LiCl. How many atoms of chlorine does this sample contain?

**maths**

2 over 5 plus 1 over 8 equals blank plus blank equals

**Maths**

x^3+a^3 Factor= (x-a) what is the remaninder when you divide x^3+a^3 by (x-a)? Please show me your working out

**physics**

The hero pursues the villain up to the top of a bungee jumping apparatus. The villain appears trapped but to create a diversion she drops a bottle. The hero quickly straps on the bungee cord to his leg and dives straight down to grab the bottle while its still in the air. ...

**algebra**

Find the x-intecepts, for the graph of the equation: y=x^2+4x-5

**math**

what is the unit rate for $3 for 4lbs.

**physics**

2.5

**Math**

Suppose $1.00 amounts to 1.082431 at 8 % compounded quarterly. How much does $200 amount to? (a) $ 126.82 (b) $ 101.46 (c) $ 216.49 (d) $ 380.47 (e) $ 250.00

**Chemistry**

Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4(g) + H2O(g) C2H5OH(l) What is the maximum amount of ethanol (in grams) that can be produced when 1.0 kg of ethylene (C2H4) and 0.014 kg of steam are placed ...

**math**

Kayla has 5 quarters, 3dimes,2 nickles and 5 pennies. How many different combonations of coins can she make to have 0.50?

**pre algebra with pizzazz 239**

Idk

**Living environment**

Homeostasis

**Physics**

Once a 15 kg crate is in motion on a horizontal ﬂoor, a horizontal force of 51 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s What is µk, the coeﬃcient of kinetic friction, between the crate and the ﬂoor?

**physics**

In 1976, the Lockhead SR-17A Blackbird set the record speed for any airplane: 3.53x10^3 km/h. suppose you observe this plane ascending at this speed. For 20.0s, it flies at an angloe of 15.0 degrees above the horizontal, then for another 10.0s its angle of acsent is increased ...

**History Please Please**

thank you very much for your help.

**History Please Please**

Could you please explain to me: how was the structure (Collosus of Rhodes) effective for it's stated purpose? I don't understand the question and I need something for my project. Pleaseee.

**Physics**

The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about .840 s longer to complete 365 revolutions than it did in the year 1906. What was the average acceleration of the Earth during this time? ...

**physicsURGENT**

An 85 cm long pendulum with a 0.80 kg bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, the speed of the bob is 2.8 m/s. What angle does the pendulum make with the vertical when the speed of the bob is 1.4 m/s?

**math**

A set of 100 open lockers are numbered from 1 - 100. Sarah comes by and closes all the lockers with even numbers. Then Sarah walks past the lockers again and checks the ones numbered with multiples of 3. If the locker is closed, she opens it; if it is open, she closes it. She ...

**History**

Colossus of Rhodes: Was the structure effective for its' stated purpose?

**Math**

thank you very much

**Math**

A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished? How do you get 32 tiles?Can you please explain?Thanks

**Math**

240 / 6= 40 in both teams. So I don't know how to explain this problem to the teacher because I have to justify my answer. Please help me. Thanks

**Math**

A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished?

**math**

I Wanted To Find The Square Root Of (1-2i) But I Didn't Know How To Solve It. My Solution : x+yi = sqr(1-2i) x2-y2+2xyi = 1- 2i x2-y2 = 1 2xy = -2 y = - 1/x x2 - (-1/x) = 1 ] * x2 x4-x2-1 = 0 How To Evaluated (x4-x2-1) ? I Tried To Sol

**Calculus**

thanks Damon, in HS and this is kicking my butt!

**Calculus**

equation of tangent line of the function sqrt (3x+5) where x=10

**calculus**

A trough is 16 ft long and its ends have the shape of isosceles triangles that are 5 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 11 ft3/min, how fast is the water level rising when the water is 7 inches deep?

**Physics**

35=a 7.94=t

**Math**

I Don't Know What Is This Subject Called In English But It's About Complex Numbers it says 25 = 16 - 9 i^2 = (4 ± 3i) But My Teacher Says 25 = 25 - 0 i^2 = (5 ± 0i) I Think My Teacher Is Wrong , The Result Is 25 But There Will Not Be Complex Number ...

**Calculus**

yeah that's what I meant

**Calculus**

If f(x)=[x−1/(1+5 x)], there are two points on the graph of y=f(x) at which the tangent lines are parallel to the line x−2y=2. Type in the x values of these points. Type the smaller number first, then the larger number.

**U.S HISTORY**

thanks but i still didn't find the answer

**U.S HISTORY**

What was Benjamin franklins reaction to the colonies refusal to accept the Albany plan of union?

**U.S HISTORY**

then do it

**U.S HISTORY**

LIST TWO REASONS THE FRENCH FELT THREATENED BY BRITISH INTEREST IN THE OHIO RIVER VALLEY?

**U.S HISTORY**

THANKS, SO WHAT IS THE ANSWER. I REALLY NEED IT NOW FOR MY HOMEWORK :)

**U.S HISTORY**

WHY DID COLONISTS CONSIDER GEORGE WASHINGTON A HERO, EVEN AFTER HE WAS DEFEATED BY THE FRENCH? PLEASE ANSWER IT THANKS JACK

**islamic studies**

it was actually my friend that asked the question not me so i put his name