# Posts by marina

Total # Posts: 197

**Algebra**

Jennie skated for 2 5/6 hours on Saturday and 1 3/6 hours on Sunday. Her goal was to skate 6 hours over the weekend. How much longer does Jennie need goal? Show your work.

**Math**

Jack is learning to ride a bicycle. In his first try, he rode for 1/100mile. The second time he rode for 5/100 mile. In the next two tries, he rode successfully for 2/10 mile and lo 4/10 mile Part A What is the total distance he rode the bike in four tries? Use words, numbers...

**Math**

Kelly has 236 feet of fence to use to enclose a rectan space for her dog. She wants the width to be 23 feet. rectangle that could be the space for Kelly's dog. La length and the width.

**Math **

A landscape architect is designing a new park for the city.His design must include the following types of figures. Exactly 4 boundary segments Exactly 1 pair of boundary segments must be parallel The intersection of at least two of the boundary segments must form an obtuse ...

**Math**

A camera lens rotates 15 degrees and then stops to take a picture.They it rotates 5 degrees take another picture. The camera takes two pictures in each rotation cycle. How many cycles does the camera lens go through to reach 100? This is how it is in the book

**Math**

A camera lens rotates 15° and then stops to take a picture.They it rotates 5 take another picture. The camera takes two pictures in each rotation cycle. How many cycles does the camera lens go through to reach 100 Justify your answer.

**Algebra**

A camera lens rotates 15° and then stops to take a picture.They it rotates 5 take another picture. The camera takes two pictures in each rotation cycle. How many cycles does the camera lens go through to reach 100 Justify your answer.

**Algebra**

A clock's minute hand moves 60 grade in 10 minutes and 180 grade in 30 minutes low far does it move from 11:00 to 11:40? What is the problem asking you to find? The measure of the angle on a clock from What do you need to know to solve the problem? What is the measure of ...

**Algebra**

A large angle is made up of two smaller angles. The smaller angles measure 48 and 11. What is the measure of the large angle?

**Math**

Dale grew 63 tomatoes. She sold them at a roadside stand. She put 5 tomatoes in each carton and sold each full carton for $3. How much money will she make for all of the full cartons?

**Geometry**

Steve, thank you so much for your help.

**Geometry**

Given IE is congruent to GH, EF is congruent to HF. F is the midpoint of GÌ. Prove the triangles EFI is congruent to HFG. . Can you please help me to understand how to do this problem? I don't understand how to find a proof. Thank you so much for your help.

**Math algebra**

The sum of the measures of the angles of a triangle is 180° Find the three angles of a triangle if one angle is 20° greater than the smallest angle and the third angle is twice the smallest angle.

**Math**

Thank you

**Math**

Joleen earns $250 plus a commission of 3% of her sales each week. This week she wants to earn $460. How much in sales does she need to meet her goal?

**Algebra 1**

Thank you again. I understand these now.

**Algebra 1**

Thank you so much for helping me with the first question. I have and another question that I am a little confused on also, could you please help me with this one too? Y-8=3/7 (X-6) I got y= 7/3x +38/7 Is this correct?

**Algebra I**

Thank you Steve so much!

**Algebra I**

Can you please show me the steps and solution to this problem? I really don't understand. Thank you very much. Write an equation in slope-intercept form of the line through points S(-2, -7) and T(4, 3).

**physics**

A race car track has been constructed with the a bank angle of 32.7° so there is no friction force. The race car track has a curve radius of 394 m. What speeds, for the race cars, has the track been designed to accommodate?

**physics**

a 280. kg crate, to the right of the pulley, is released from rest and begins to fall to the ground. If the mass on the left is m=160. m=160. kg, what is the magnitude of the tension of the rope attached to the 280. kg crate? Assume the rope and pulley are massless.

**physics**

A group of construction workers are building a house and want to lower down an excess bundle of 2390 kg bricks to ground. They tie one end of a rope to the bundle of bricks, loop it through a pulley, and tie the other end of the rope to a toolbox. If the coefficient of ...

**physics**

A row of blocks are lined up with masses of 1.10 kg, 2.72 kg and 4.05 kg. The masses are then pushed forward by a 14.3 N force applied to the 1.10 kg block. If the table is frictionless, how much force does the 2.72 kg block exert on the 4.05 kg block?

**math**

A 1963 Chevy Bel Air, a classic car today, cost $2400 new in mid-1963. How much would that be in 2012 dollars?

**math**

if inflation had been 3% each year from 2002 to 2012, what would theCPI have been in 2012?

**math**

I need help

**Math**

Thank you Steve very much

**Math**

Simplify and evaluate the expression for a = -0.5, b = 2.5 2.5a - 3b(-4.1 + a(-3.3b - b) - b) + a

**Math Terminology**

Is it correct, then, that 7 is the constant and the entire thing is the equation?

**Math Terminology**

Identify all the components of this statement: 3a + 2b = 7 Is this an equation or an expression and why? constant variable term expression equation I believe it is an equation because it has an equal sign I believe the constant is 7 because that never changes I'm not sure ...

**Math**

thank you Ms. Sue!

**Math**

Thank you, John, that makes perfect sense.

**Chemistry**

The solubility of insoluble substances changes depending on the nature of the solution. Below are two solutions in which copper (II) hydroxide is dissolved; in each case, the solubility is not the same as it is in pure water. a. For each solution state whether the solubility ...

**Chemistry**

An iron nail with a mass of 0.750 g was dissolved in dilute sulfuric acid and diluted to 100.0 mL volume. A 10.0 mL aliquot of this solution was then titrated with standard 0.200 M potassium permanganate solution, according to the following equation: MnO4- + H+ +Fe2+ --> ...

**algebra**

find an equation of the linear function f using the given information ; f(x) increases by 6 when x increases by 3.

**Trigonometry**

I am having trouble solving this. A rocket tracking station has two telescopes A and B placed 1.7 miles apart. The telescopes lock onto a rocket and transmit their angles of elevation to a computer after a rocket launch. What is the distance to the rocket from telescope B at ...

**Algebra**

I am having a hard time with this question. A boat went 15 miles downstream in 1 hour and then returned upstream to its dock in 5/3 hours. if the current of the stream was constant, find the speed of the boat in still water and the speed of the current

**Math**

6 m of soil containing 50% clay was mixed into 10 m of soil containing 10% clay. What is the clay content of the mixture? How much salt should be added to 80 pounds of a 5 % salt solutio to make it a 24% salt solution Thank you so much!

**math**

Thank you Reiny for your help

**math**

Mrs. Crawford has invested $ 6,000 at 3% interest. How much additional money should she invest at 8% interest so that the total income will be 4% of her total investment? Scott asked you to make 10 gal. of fruit punch that contains 85% fruit juice by mixing together some Sweet...

**math**

Thank you so much Steve

**math**

Mr Joyce invested $ 25,000, part at 4% interest and the remainder at 7% interest. The total income he received from his investment was $1,450. How much did he invest at each interest rate? Thank you

**College Algebra**

Find the time required for an investment of 5000 dollars to grow to 7900 dollars at an interest rate of 7.5% per year, compounded quarterly

**College Algebra**

A wooden artifact from an ancient tomb contains 45% of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made

**Algebra**

A wooden artifact from an ancient tomb contains 45 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made

**Algebra**

You go to the doctor and he gives you 13 milligrams of radioactive dye. After 20 minutes, 4.5 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm ...

**Pre Calculus**

The doubling period of a baterial population is 10 minutes. At time t=80 minutes, the baterial population was 50000 1What was the initial population at time t=0 2Find the size of the baterial population after 4 hours

**Psychology & operational definition**

I apologize for not being specific. The examples I gave, I'm curious if they would be examples of an operational definition.

**Psychology & operational definition**

I came up with some examples on my own, but I'm not sure if I'm heading in the correct direction. Any help would be great. Here are my examples: 1. My grandmother's recipe for red velvet cake 2. An actress has memorized her lines when she can repeat all of her ...

**Algebra**

How to simplify 6y (3y <squared -1) We are doing trinomials

**English - Please read.**

Thank you Reed for the tip and thank you so much GanonTEK for the help!! Much appreciated!

**English - Please read.**

I know what an epic simile is but I'm trouble finding two epic similes in these line I've given below. And I also need to know why I think the author used these two epic similes Please help! Here's the lines I have to find the two from : The Odyssey : Book 9 "...

**math**

For volume all you have to do is multiply all three numbers by each other. Your problem would be 4 times 18 times 7 = 504 cm CUBED!! Don't forget to add the units to the end results. Because if you had cm squared that would be saying it was another type of measurement.

**Business Law**

You need the definitions first. Irrevocable - cant be changed, reversed or recovered. Its always going to be final. I'm not sure how to give a definition of express because that is more of an expression so we can eliminate B. Interested - Having an interest or involvement...

**Science!!!**

yeah sure

**Science!!!**

No the answer is not D. Its not D because since the forces are being pushed into opposite directions, (being pushed together) you would NOT add. The answer is A. Its A because there is still force coming from the left side. So when they are opposite of one another (different ...

**Math**

whats the question..?

**social studies**

Advantages of a reconstituted family: 1. More support- more siblings around you for further support 2. Develops tools in preparation of living with others for potential roommate situations in the future. 3. Creates a team environment 4. Physical and Emotional Support: ...

**scince conditon**

I'm not able to get on my email yet.. But when I can ill be sure to contact you and you can ask me whatever it is..

**scince conditon**

Well, you definitely need to start sitting up straight. (i hope that you are now) But it really depends on how serious your condition really is. If it is serious your doc SHOULD have given you a brace to wear so your spine doesn't curve more and more. Which type curve you ...

**Math**

15.24 divided by 24 equals 0.64.. BUTTT.. Make sure you know the order of the problem because by simply switching 15.24 and 24 make a difference sooo.. 24 divided by 15.24 equals 1.57 (1.6) See the difference? so make sure you know the order and it will one of those two ...

**Math**

Yeah it is and no problem.. But like i said don't forget to put it as 3.7 (only if your teacher is picky about rounding)

**Math**

You have to add all together, then take that sum and divide it by how many numbers there are. For instance you have 3 numbers . So you would do 4.3 + 3.7 + 3.13 which equals 11.13. Then you take that number and divide it by 3 which is equal to 3.71 or just 3.7 depending on if ...

**English HELP!!!!😰😰**

At the minimum, a prepositional phrase will begin with a preposition and end with a noun, pronoun, gerund or clause, the "object" of the preposition. The object of the preposition will often have ONE OR MORE modifiers to describe it. Heres a couple examples : "...

**health**

>Numerous< is the answer. Capillaries form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and ...

**Art - Drawing**

Thank you bobpursely and Ms.sue(:

**Art - Drawing**

Can you give me some tips on how to draw graffiti (anything really)? I am good with drawing something but the thing is I have to look a picture to draw it. Its almost as if I don't have enough imagination. But since that's how I've been drawing, tips please?

**Spanish**

Yes we have been through the alphabet and verbs, nouns and endings. (: and I appreciate you taking the time to help me out. But we don't necessarily use our text books as often. Its mostly her teaching and us doing hands on worksheets and etc. And I do believe that I am a ...

**Spanish**

I am currently in Spanish 1. I am gradually catching on to Spanish, but my question is.. Can you help clarify to me when I should put a small word before a verb or noun.. for instance "los libros" How do I know whether its La, los and etc.? I know it has something to...

**Spanish**

This means "you ask many times as a main course" If anything, the easiest route you can take to finding a word or sentence out is using google translate. If it seems like its taking forever to get a response or if you need the answer right away. Hope I helped (:

**Math**

Express sin(x+y+z) in terms of cosines and sines of x, y and z

**Math**

An isosceles triangle has an area A, an apex angle 2 theta, and a height of h. Determine an expression for theta in terms of A and h.

**Physics**

Starting from rest, a horse pull a 250-kg cart for a distance of 1,5km. it reaches a speed of 0,38m/s by the time it has walked 50,0m and then walks at constant speed.fictional force 260n.each gram of oats the horse eats releases 9kJ of energy. 10% of this can go into work the...

**Math**

The table shows the number of people switching to a new telecommunications company over a 7-day period in August. Day=number of people 1=10 2=17 3=37 4=79 5=106 6=231 7=500 Using this estimate how many people will switch on august 31st. * it's an exponential and ...

**Math**

The table shows the number of people switching to a new telecommunications company over a 7-day period in August. Day=number of people 1=10 2=17 3=37 4=79 5=106 6=231 7=500 Using this estimate how many people will switch on august 31st. * it's an exponential and ...

**physics please help!!**

Ok, I might have figured this one out but I am not sure so someone else feel free to correct me if I'm wrong. first I found the torques around the two points T=r*(m*-9.81)+r*(m*-9.81) make sure for the radii you use the center of mass for the diver the distance from the ...

**Physics**

Ok, I might have figured this one out but I am not sure so someone else feel free to correct me if I'm wrong. first I found the torques around the two points T=r*(m*-9.81)+r*(m*-9.81) make sure for the radii you use the center of mass for the diver the distance from the ...

**Physics**

just realized I forgot to turn 70g into kg so ignore the answer I gave for work It should be 101.61 (just moved the decimal over three places)

**Physics**

I might be wrong but I may have just figured out how to find the tension even though it is not the way they wanted since the order is wrong but using the work we found we can probably use W=Fd and say the distance is the change in radius to get the force on the string. I hope ...

**Physics**

Based on the fact that this is the exact same problem I am doing at the same time of the year I am guessing you might have been in physics 221 at Iowa state. If you are also in this class this may help you Paul, I have not figured out the tension part but a) momentum is ...

**pre-calculas**

correction of problem. Should be: -2x squared + 6x + 5 = 0 Sorry about that! Thanks for your help!

**pre-calculas**

Use "completing the square" to find the zeros of the polynomial. =2x squared + 6x + 5 = 0

**pre-calculas**

find the LCD and solve: x+3 12x + 4 1 - 2x ____ + _________ = _______ 3-x x squared - 9 x + 3

**pre-calculas**

simplify the following complex fraction: x ____ -2 x-5 _____________________________________ x squared - 9x - 10 ____________________ x squared - 25

**pre-cal.**

simplify: 2(x+h)squared+5(x+h)-6-(2x squared + 5x - 6)

**pre-calculas**

rationalize the denominator: 5 + the sq. rt. of 3 ________________________ 4 + the sq. rt. of 3

**physics**

A girl with a mass of 83 kg is climbing in a tree 20 m above the ground. If she lands on a trampoline with a constant of 312 N/m, how far will the trampoline stretch and how fast will she be moving just prior to landing on it?

**physics**

A bomb is dropped out of a plane 100 m above the ground, how fast will it be moving when it hits the ground?

**physics**

A golfer hits a ball off a tee from an elevated platform 13m above the ground. if the golf ball leaves the tee at 85 m/s @ 15 degrees, find the flight time, the maximum height above the ground and the horizontal displacement of the golf ball.

**physics**

A soccer ball is kicked off of the ground at 17 ft/sec @ 30 degrees. Determine the maximum height above the ground the ball reaches and how far downfield the ball lands.

**physics**

A boy runs off the edge of a 5 foot high wall @ 2.5 ft/sec. How long will he spend in the air? How far from the base of the wall will he land?

**physics**

How much force is needed to accelerate a 125 kg block up a 35 degree include at 3.4 m/s2 if the coefficient of friction is 0.28?

**physics**

A 625 N crate, which is at rest on the floor, is pulled along the floor by a horizontal force of 85 N. The coefficient of friction is 0.11. How far will the crate go in 4.5 seconds?

**physic**

What is the necessary coefficient of friction needed to keep a 1200 kg car on a road moving at a speed of 27 m/s on a turn with a radius of 30 meters?

**physics**

Two cables suspend a 500 N sign above the hallway. The left cable makes a 40 degree angle with the ceiling and the right cable makes a 50 degree angle with the ceiling. What is the tension in the left and right cables?

**physics**

What is the apparent weight of a 55 kg person in an elevator accelerating downward at 2.2 m/s2?

**physics**

25x 45 = 1125 9.6 meters = 9600 km 9600/2 = 4800 1125/4800 = .234375

**physics**

Compute the force of attraction between a 25 kg. mass and a 45 kg. mass that are 9.6 meters apart from center to center.

**physics**

A 50 foot see-saw has 4 kids sitting on it. A 62 lb. girl sits on the left end, with a 76 lb. girl sitting 2.5 feet in front of her. On the right side, a 96 lb. boy sits on the end and has another boy sitting 2.5 feet in front of him. How much does this other boy weigh?