# jack

Newest questions posted by jack-
## Physics

1. A car travels 80 mi at a speed of 55mi/h. It encounters traffic and only travels at a speed of 15mi/h for a distance of 5mi. 2. A horse travels at 19m to left for 8.6s, and then turns around and travels 12m to the right for 18.4s. a) What are the -
## Physics

1. A car travels 80 mi at a speed of 55mi/h. It encounters traffic and only travels at a speed of 15mi/h for a distance of 5mi. 2. A horse travels at 19m to left for 8.6s, and then turns around and travels 12m to the right for 18.4s. a) What are the -
## Political Parties

What were the active political parties in 1776, and 1870? -
## Career

Please check my answer In which of the following would a person works as a business administrator be interested? 2 points A. convincing someone to purchase a project** B planning employee work schedules C. typing memos and letters D. writing facts, -
## Career

Which of the following are the top two job expectations of people who career plan Hours** Benefits Type of work** coworkers security Which of the following is an example of a job that would supply a good that would meet a need? limo driver** actor farmer -
## math

1÷2(6+4x)-1÷4(8x-12=1÷2(2×-4) -
## Math

Write and expression to represent the area of a trapezoid, which can be found by multiplying the height of the trapezoid by half of the sum of base1 and base2. -
## Maths

Prove that tan4x=4tanx(1-tan²x)/1-6tan²x+tan⁴x. -
## Science

Which of the following is true about the single-celled paramecium? A. It is an example of a higher form of animal B. It has life functions similar to ours C. It lacks the ability to circulate D. It lacks life functions -
## Math

If 2/y+2 = -3/y-3, then what is the value of y? A. -3 B. -2 C. 0 D. 2 -
## math

when 0.0709 is rounded to the nearest thousandth, the result is A. 0.0709 B. 0.0701 C. 0.070 D. 0.071 is D correct? -
## math

You have to answer 2 essay questions for an exam. There are 8 essays to choose from. How many different groups of 2 essays could you possibly choose? -
## geography

please help!!! l have a homework l need to write a paragraph about the effects that humans have on endangerment and extinction of species -
## Science

What is the endocrine system for. -
## math

Fiona is repairing the wiring on a radio broadcast tower. She is in the basket of the repair truck 40m from the tower. if she looks up at an angle of 42° she can see the top of the tower. She can see the base if she looks down at an angle of 32°. How -
## Maths

Out of 25 students 3 were absent. What percent of the students Were absent Were present -
## Physics

1. A concave spherical mirror has a radius of curvature of 29.4 cm. The object distance is 5.7 cm . Find the magnitude of the image distance. Answer in units of cm. 2. Find the magnification. -
## Physics

plane’s sound detector perceives the horn’s sound, the plane has traveled a distance equal to one-half its altitude above the ocean. If it takes the sound 1.658 s to reach the plane, determine the altitude of the plane. The speed of sound is 343 m/s. -
## Physics

The distance between two successive crests of a certain transverse wave is 1.10 m. 10 crests pass a given point along the direction of travel every 11.1 s. Calculate the wave speed. Answer in units of m/s. -
## science (physics)

if a car is driving on a flat road at a constant speed. the driver drives off a cliff which is 180 m above a river it lands in the river 90 m away (measured horizontally), how long does it take for it to land -
## Physics

In Young's experiment a mixture of orange light (611 nm) and blue light (471 nm) shines on the double slit. The centers of the first-order bright blue fringes lie at the outer edges of a screen that is located 0.452 m away from the slits. However, -
## Physics

The pupil of an eagle’s eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. From a distance of 182 m, the eagle sees them as one unresolved object and dives toward them at a speed of 15 m/s. Assume that the eagle’s eye -
## Physics

A 2.60-kg block is attached to a horizontal spring that has a spring constant of 214 N/m. At the instant when the displacement of the spring from its unstrained length is -0.115 m, what is the acceleration a of the object? In your answer, be sure to -
## science

where does the Housatonic river in Connecticut originate and what is its base level? -
## Math

Eunice runs around an oval quarter-mile track, completing one lap every 2 minutes and 30 seconds. At this speed, how many seconds will it take him to run a mile? -
## marketing

Competitors that offer similar content to Motor Trend on Demand -
## English

I was wondering if anyone could give me an idea for this essay prompt? Describe a situation in which you have made a direct impact on the life of someone else. I just have no idea where to start or write about... -
## Science

1) What unit is speed measured in? 2) Why is it important to include units when describing motion? I've read this entire lesson. I just can't seem to find these answers. -
## chem

How many moles of S are needed to combine with 0.208 mol Al to give Al2S3? break it down thanks -
## mathematics

camine has 3 pieces of wire . the lenght 1st wire 5 meters the lenght of second wire is 3 meters less than tice the lenght of third wire . what is the peremeter of the triangle if the wires are connected end to end and the scond 9 meters long -
## Math

How is log(base(x))x^m-1=1 My Answer Key says m-1+1=0 but I don't understand that solution -
## Feedback Control

The goal of this project is to model the longitudinal motion of a Segway and design a PID controller for it. The model must include the dynamics of the inverted pendulum on two wheels, as shown on Figure 1 (left), and the model of the DC motors (same as ) -
## Math

solve the equation t/4=20 -
## Math

Elliot has twice as many trading cards as Sam. Elliot has 20 trading cards. write and equation and use it to determine the number of trading cards Sam has. a. s+2 = 20;18** b. s/2 = 20;40 c. 2s = 20;10 d. s-2=20;22 -
## Math

Find the unit rate for a sponge cake that weighs 25 ounces and has 2750 calories. A. 0.009 calories per ounce B. 110 calories per ounce** C. 68,750 calories per ounce D. 115 calories per ounce -
## math

50 is what percent of 13? Thanks -
## Math

kory is standing near a building that has a shadow that is 14 feet long. Kris is 5.5 feet tall, and the length of her shadow is 3.5 feet. set up and solve a proportion to determine the height of the building. -
## math

Tamika’s dad bought a Mustang convertible for 12,000 dollars to celebrate his first job in 1978, which paid him 15,000 dollars a year. If Tamika is to use the same fraction of her salary as her dad to buy a Mustang convertible, which now sells for 32,000 -
## maths

Pedro earns 7.50 dollars an hour at his job at Matrix Cinemas. If he works 20 hours this week and his employer withholds a total of 22 percent of his weekly pay for taxes and Social Security, what is his take-home pay for the week? -
## Math

Hwan decides to lose weight before the wrestling season begins. He weighs 148 pounds now and loses one pound per week for six weeks. Let y represent Hwan’s weight and let x represent the time in weeks. What is the slope of the line? The y intercept is -
## Math

Hwan decides to lose weight before the wrestling season begins. He weighs 148 pounds now and loses one pound per week for six weeks. Let y represent Hwan’s weight and let x represent the time in weeks. What is the slope of the line? What is the y -
## stast

suppose the alternative hypothesis in a hypothesis test is "the population mean is less than 60" if the sample size is 50 and alpha =.05, the critical value of the z is? -
## Math

What is the next term in the sequence 81, 27, 3, 1, 1/3... -
## Math

Detemine the sequence as arithmetic, geometric, both or neither. 16,8,4,2,... -
## Science

Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens. A. Integumentary system B. Nervous system C. circulatory system D. endocrine system I think it is C -
## Math

Which proportion has cross products of 5*24 and 8*15? A. 5/8 = 15/24 B. 5/24 = 8/15 C. 8/24 = 15/5 D. 15/8 = 5/24 -
## Math

Which ratio forms a proportion with 18/30? A. 20/35 B. 50/90 C. 36/48 D. 60/100 -
## Math

Which Ratios for a proportion? A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25 -
## Math

Which Ratios for a proportion? A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25 Which ratio forms a proportion with 18/30? A. 20/35 B. 50/90 C. 36/48 D. 60/100 Which proportion has cross products of 5*24 and 8*15? A. 5/8 = 15/24 B. 5/24 = 8/15 C. 8/24 -
## Math

Convert the map scale to unit rate. How many inches represent one mile? Show Your work. Interpret the meaning of unit rate. 3/10 in. = 7/8 miles -
## Math

Write the ratio as a unit rate -
## Math

Write the ratio as a unit rate. 8 meters in 10 seconds. A. 0.8 meter per second B. 1.125 meters per second** C. 2 meters per second D. 80 meters per second -
## History

What was the 54 mile civil rights march called that was after bloody Sunday? -
## Math

an object is moving along the x-axis such that the position of the object in masters at time t in seconds is giving by the function x(t)=t^3-12t^2+36t-5, for 0 -
## Math

The cost in dollars of a class party is 59+13n, where n is the number of people attending. What is the cost for 44 people. -
## Math

d+g/h for d =35, g = 19, and h=6 -
## Math

you want to buy three books that are on sale at 20% off. the original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With distribution. Calculation without distribution. -
## History

Why was northern Italy a natural birthplace for the Renaissance? -
## algebra

George is starting a new streaming music service. For a monthly fee, you can stream 50 songs. There is an additional charge for each song over 50. In August, Bill was charged $11.22 for 67 songs and in September he was charged $13.50. Write a function for -
## Math

Solve using metal math. a) 4y+3=19 b) 2+3m=17 -
## Math

Solve the equation 5.8 = z/2.2 -
## Math

Solve the equation 2.8x = -9.24 -
## Math

What Value of x is a solution to the equation? x-2 = 16 -
## Math

Write an algebraic expression for the sum of 3 Coins and c Coins -
## Math

Evaluate -5g-6 for g = -2 -
## MATH PLEASE HELP

1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to -
## Math

1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to -
## Math

-5g - 6 for g=-2 -
## math / science

a bacteria population doubles every eight minutes. if the population begins with one cell how long will it take to grow to 512 cells? -
## pre calculus

Double Angle Formula. If the double angle formula for cos2(u) = 2cos^2(u)-1, then write the double angle formula for cos2(u) in terms of sine. -
## art

keeping facial features in proportion means -
## Math

The track at Coolidge Middle School is 14 of a mile long. It takes Melissa 1 minute and 40 seconds to run around the track. How many minutes will it take Melissa to run 3 miles? -
## physic

The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 50 m in a straight line, reaching a final speed of 79 km/h. Determine the cheetah's average acceleration during the short -
## CHEMISTRY

2HBr+Mg(OH)2 -> MgBr2+2H2O how many mL of a 0.2 M HBr solution is required to react with 40 mL of a 0.40 M Mg(OH)2 solution -
## math

simplify 8/2 + 9 (12 divided by 3x2)-7 explain each of your steps i thought it was 1 -
## math sequence

5th term for recursive sequence: a(1) = 1 a(n+1)=3a(n)-1 -
## grammar

Is this correct? It is the waves, where... The "it is the waves" part. thanks -
## algebra

3x^4 + 5x^2 - 2 = 0 give imaginary and real roots rational roots theorem factors of (+-)p/q are possible rational zeros of function f where the coefficients of f are integers. how do you go about solving this? -
## Algebra

4x^2 - 13x + 3 How do you break this into groups? So far I'm having trouble with this type of concept. Please explain it, thanks! -
## Grammar

I apologize for asking too many of these questions, but I need to know for sure if I'm doing this right. "Thus the creation of infinite universes from this world of nothing was prevented." I'm confused if it is was or were again. When I say it to myself, I -
## Quotations

When starting a new sentence, do you add a capitalization at the beginning of the next dialogue format? Like this. He seemed to like it. "Mmm! This tastes good!" said Bardo. or "Mmm! This tastes good!" Said Bardo. -
## grammar

" This had never happened before. Usually he would be the one who wakes up the earliest. " Is there anything wrong in this sentence? -
## Grammar, sentence structure

"Yesterday was Aldo’s 15th birthday, friends and relatives travelled half a hundred miles by horse from the grand streets of Rome to have a dinner party." I'm having a very bad time structuring this sentence correctly so it can flow easily when speaking. -
## grammar

I like the new layout of the website. It looks very clean. I need help with this. "My family were of the middle class" Is this correct in terms of grammar? And is there a better way to write it? -
## Finance

First Inc. is facing a liquidity problem and needs to issue a perpetual bond that is callable only at the end of year 2. The call price is $1,000 (face value) plus an additional coupon payment. The current interest rate is 8% per year. At the end of each -
## rationalizing

sqrt(18) - sqrt(17) How does this expression equal 1/(sqrt(18) + sqrt(17)) ? How would you change it like that? And why is this good to use when not using a calculator? -
## composite functions

f(x) = 2/3x-1 g(x) = x+4/x (g o f)(x) = ? x does not equal 1/3 Can someone explain how to do this one? -
## math

to simplify (2sqrt(b)-sqrt(3a))(2sqrt(b)+sqrt(3a)) answer is -3a+4b. how would you get this? -
## algebra

The values from a stem-and-leaf plot are:27,27,29,33,38,44,44,44,46,50,58,in numerical order.Please explain how to find the lower quartile for this set. I would take the median of the first five values 27,27,29,33,38;this would make 29 the lower -
## algebra

The following stem-and-leaf plot values shows the average monthly sales commissions (in hundreds of dollars)for a major corporation's nationwide sales group : 27,27,29,33,38,44,44,44,46,50,58. What is the mode of this distribution? Thank You. -
## algebra

The following stem-and-leaf plot values show the average monthly sales commissions (in hundreds of dollars)for a major co rporation's nationwide sales group: 27,27,29,33,38,44,44,44,46,50,58. What is the mean of the distribution? Please show as much work -
## math

Emma is X months older than molly. If molly is 9 months old, write an expression for emmas age M= Months x= emmas age XM= 9 ? -
## Math

Given that a and b are nonnegative real numbers such that a+2b=60, what is the largest possible value of ab? And If f(x) = x^2 - 3x + 4, find the value of f(sqrt3 - sqrt2). And The median of {20, x, 15, 30, 25} is 0.4 less than the mean. If x is a whole -
## Math

There are two cubes. Their lengths are in the ratio 3:4, what is the simplified ratio between their volumes? -
## Math

There are two squares. Their lengths at the ratio 2:3, what is the simplified ratio between their areas? -
## polynomials and zeros

5x^2 + 4x - 2 = 0 How would you solve this by graphing? Do you just draw a graph by finding x and y? The answer is -(2-sqrt14)/5, -(2+sqrt14)/5 There's no way you can just graph it and come up with these numbers by finding the integers of x. How would you -
## Quadratic Equation (math)

-10x^2 + 7x - 1 = 0 Use factoring to solve -
## math

dependent or independent taking a quarter out of a bag and then taking another quarter out of the bag without replacing the first quarter -
## Physics 2

What quantity of heat is needed to convert 1kg of ice at -10C to liquid at 20C? -
## Physics 2

How many grams of steam at 100C must be mixed with 200g of water at 20C in order for the equilibrium temperature to be 50C?