# Posts by JACK

Total # Posts: 1,986

**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 ) that actuate the ...

**Math**

solve the equation t/4=20

**Math**

it means that Elliot had double the amount of cards that Sam has. (Example Elliot had 12 cards and Sam had 24 cards)

**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**

No that was not me. what is the link

**math**

50 is what percent of 13? Thanks

**Math**

Ok

**Math**

I got 23 ft.

**Math**

What would the height of the building be.

**Math**

Thank You!

**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 dollars, what ...

**maths**

thats wrong

**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 148

**Math**

Wait so the slope is -x and y intercept is 148?

**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 intercept

**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

**social studies**

Thanks 100% :)

**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 = 15/5 D. 15/8 = 5/24...

**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**

Thanks

**Math**

286 miles in 5 1/2 hours

**Math**

Write the ratio as a unit rate

**Math**

Ok thanks

**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**

Thanks!

**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<=t<=8 a- when is the object moving right? and when to the left? b- When is the object's velocity both ...

**Math**

Thanks

**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**

Thank You

**Math**

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

**Math**

How do i do this with and without distribution?

**Math**

Thanks

**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**

Thank You

**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 the total charge. ...

**Math**

These two are correct i just finished the quiz.

**Math**

a) y=4 b) m=5 Would this be correct

**Math**

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

**Math**

One of the sides is 5.8 but would the other side go in the place of z. that is what i thought.

**Math**

There are not given 2 sides to divide. What do you mean.

**Math**

Solve the equation 5.8 = z/2.2

**Math**

Thank you so much

**Math**

Solve the equation 2.8x = -9.24

**Math**

I solved this. It is 18

**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**

Thank You

**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 the nearest whole ...

**Math**

I know how to do these now thanks

**Math**

or how to do them

**Math**

I really just don't understand algebraic equations like these

**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 the nearest whole ...

**Math**

-5g - 6 for g=-2

**religion**

they help and pray for the people in need

**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**

ohhhhh, i see! thank you for making it simple to understand

**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?

**Science Please helpppp me!!**

The answer is D) Multicellular. Hope this helps.

**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 sprint. m/s2

**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?

**Brains!**

There are people who disagree though, but this is what I think!

**Brains!**

I agree. Your brain is like a hungry sponge and needs to constantly absorb information, and I think this applies to it. I don't think wasting "brain energy" is a problem since the brain uses representations and known examples to easily 'record' things.

**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 year, interest rate ...

**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--algebra 2**

| x - 4 | < 3 rule -> |x| < a -> x < a, x > -a x - 4 < 3 and x - 4 > -3 solve x - 4 < 3 -> x < 7 solve x - 4 > - 3 -> x > 1 you have x < 7 and x > 1 combine, 1 < x < 7 #2 remember rule ^^ |5x - 2| > 5 remember the "...

**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 quartile.Is this correct? Is ...

**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 as possible. Thank...

**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**

Oh, that makes a lot more sense thank you

**Math**

I still don't understand the second one, can you explain it more please? I've gotten to 1-sqrt 3+sqrt 2 but I don't know what to do next, or if it's wrong.

**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 number, what is the sum...