# jack

Newest questions and responses by jack-
## MATH

What is 2 * 2+ 2?

*asked on December 7, 2018* -
## Physics

If a car accelerates at a constant rate of -5.60m/s^2 while braking, the velocity changes from +12.5m/s to +3.30m/s. a) determine the amount of time it takes to do this. b) determine how far the car travels during the time.

*asked on October 26, 2018* -
## 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

*asked on October 9, 2018* -
## 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

*asked on October 9, 2018* -
## Political Parties

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

*asked on September 18, 2018* -
## 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,

*asked on September 14, 2018* -
## 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

*asked on September 4, 2018* -
## math

1÷2(6+4x)-1÷4(8x-12=1÷2(2×-4)

*asked on August 29, 2018* -
## 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.

*asked on August 28, 2018* -
## Maths

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

*asked on August 17, 2018* -
## 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

*asked on July 31, 2018* -
## Math

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

*asked on July 26, 2018* -
## 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?

*asked on July 24, 2018* -
## 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?

*asked on July 18, 2018* -
## 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

*asked on July 2, 2018* -
## Science

What is the endocrine system for.

*asked on June 15, 2018* -
## 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

*asked on June 13, 2018* -
## Maths

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

*asked on April 29, 2018* -
## 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.

*asked on April 27, 2018* -
## 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.

*asked on April 23, 2018* -
## 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.

*asked on April 23, 2018* -
## 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

*asked on April 19, 2018* -
## 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,

*asked on April 9, 2018* -
## 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

*asked on April 9, 2018* -
## 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

*asked on April 4, 2018* -
## science

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

*asked on April 3, 2018* -
## 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?

*asked on March 15, 2018* -
## marketing

Competitors that offer similar content to Motor Trend on Demand

*asked on March 13, 2018* -
## 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...

*asked on March 4, 2018* -
## 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.

*asked on February 27, 2018* -
## chem

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

*asked on February 15, 2018* -
## 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

*asked on January 16, 2018* -
## 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

*asked on December 20, 2017* -
## 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 )

*asked on December 9, 2017* -
## Math

solve the equation t/4=20

*asked on December 8, 2017* -
## 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

*asked on December 8, 2017* -
## 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

*asked on December 6, 2017* -
## math

50 is what percent of 13? Thanks

*asked on December 6, 2017* -
## 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.

*asked on December 5, 2017* -
## 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

*asked on December 5, 2017* -
## 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?

*asked on December 4, 2017* -
## 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

*asked on December 4, 2017* -
## 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

*asked on December 4, 2017* -
## 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?

*asked on December 3, 2017* -
## Math

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

*asked on November 30, 2017* -
## Math

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

*asked on November 29, 2017* -
## 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

*asked on November 16, 2017* -
## 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

*asked on November 13, 2017* -
## Math

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

*asked on November 13, 2017* -
## 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

*asked on November 13, 2017* -
## 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

*asked on November 13, 2017* -
## 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

*asked on November 9, 2017* -
## Math

Write the ratio as a unit rate

*asked on November 9, 2017* -
## 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

*asked on November 9, 2017* -
## History

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

*asked on November 9, 2017* -
## 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

*asked on November 7, 2017* -
## 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.

*asked on November 6, 2017* -
## Math

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

*asked on November 6, 2017* -
## 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.

*asked on November 1, 2017* -
## History

Why was northern Italy a natural birthplace for the Renaissance?

*asked on October 30, 2017* -
## 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

*asked on October 28, 2017* -
## Math

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

*asked on October 26, 2017* -
## Math

Solve the equation 5.8 = z/2.2

*asked on October 25, 2017* -
## Math

Solve the equation 2.8x = -9.24

*asked on October 25, 2017* -
## Math

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

*asked on October 25, 2017* -
## Math

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

*asked on October 25, 2017* -
## Math

Evaluate -5g-6 for g = -2

*asked on October 25, 2017* -
## 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

*asked on October 25, 2017* -
## 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

*asked on October 25, 2017* -
## Math

-5g - 6 for g=-2

*asked on October 25, 2017* -
## 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?

*asked on October 12, 2017* -
## 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.

*asked on October 12, 2017* -
## art

keeping facial features in proportion means

*asked on October 3, 2017* -
## 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?

*asked on September 21, 2017* -
## 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

*asked on September 8, 2017* -
## 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

*asked on September 7, 2017* -
## math

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

*asked on September 5, 2017* -
## math sequence

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

*asked on August 26, 2017* -
## grammar

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

*asked on August 10, 2017* -
## 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?

*asked on August 8, 2017* -
## 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!

*asked on August 6, 2017* -
## 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

*asked on August 6, 2017* -
## 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.

*asked on August 6, 2017* -
## grammar

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

*asked on August 6, 2017* -
## 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.

*asked on July 31, 2017* -
## 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?

*asked on July 31, 2017* -
## 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

*asked on July 30, 2017* -
## 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?

*asked on July 29, 2017* -
## 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?

*asked on July 28, 2017* -
## math

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

*asked on July 22, 2017* -
## 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

*asked on July 20, 2017* -
## 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.

*asked on July 20, 2017* -
## 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

*asked on July 20, 2017* -
## 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 ?

*asked on July 19, 2017* -
## 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

*asked on July 6, 2017* -
## Math

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

*asked on July 1, 2017* -
## Math

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

*asked on July 1, 2017* -
## 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

*asked on June 27, 2017* -
## Quadratic Equation (math)

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

*asked on June 27, 2017* -
## 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

*asked on June 22, 2017*