# Posts by bob

Total # Posts: 3,277

**Math**

At what point does the graph of the parametric equations y=3-2t, y=-2+5t intersect the graph of the parametric equations x = -1+3s,y=5-9s. The answer is the point of intersection (x,y). Please help! I am really confused!

*July 29, 2016*

**math**

The amount of medicine ingested by the body is a function given by A(t)= 5/6 (12t-t^2) Estimate the slope of the tangent at the point (4, 80/3). Use an interval of 0.01. Explain what the value represents for this situation.

*July 24, 2016*

**Math please help!!**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB=DE, BC=EF, and ∠A=∠D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special ...

*July 19, 2016*

**Math**

ABC is an equilateral triangle with side length 4. M is the midpoint of BC, and AM is a diagonal of square ALMN. Find the area of the region common to both ABC and ALMN.

*July 17, 2016*

**Math**

If Jane walks North for 3 miles, turns 45 degrees to the right, and then walks another 4 miles, how many miles will Jane be from her starting point? Give your answer as a decimal rounded to the nearest hundredth. Plz help!!!!

*July 17, 2016*

**Math**

The sound intensity of a soft whisper is about 1/200000 of the sound intensity of a shout. What is the decibel level of a whisper if a shout has a loudness level of about 85 dB? L = 10log(i1/10^-12)

*July 14, 2016*

**Chemistry**

alculate the amount of energy released in the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10−10m

*July 3, 2016*

**Maths**

In class 8m, there are 27 pupils. There are twice as many boys as girls. How many boys are there?

*July 3, 2016*

**Math**

Katie makes 65% of her shots from the free throw line. Can you determine how many consecutive free throws she must make in order to increase her percentage to 68%? Explain.

*July 2, 2016*

**math**

6/5

*June 30, 2016*

**Calculus**

I meant to say it is a piecewise function

*June 27, 2016*

**Calculus**

What kind of discontinuity is this: F(x)= (2x^2 - 5x -3)/(x-3) if x does not equal 3 6 if x=3 It is a pieces use function. I thought it was removable but my answer key says it is a jump discontinuity. This is from an exam review and I want to get it right.

*June 27, 2016*

**Math**

Thanks steve!!!! It is correct! Also thanks Damon for giving this an attempt!

*June 26, 2016*

**Math**

It is saying that 39/12 which is 13/4, is wrong.

*June 26, 2016*

**Math**

The sum of the three smallest positive values of theta such that 4(cos*theta)(sin*theta) = 1 is k*pi. Find k. Help!!!!!

*June 26, 2016*

**Math**

Thanks! Actually, I had like the same method as you for like the first few steps then I had a miscalculation

*June 26, 2016*

**Math**

If sin (a) +cos (a) =1.2, then what is sin(a)^3 + cos(a)^3? I was having some trouble with this problem. I got .98 as an estimate. Why is this wrong!!!1

*June 26, 2016*

**Math**

the answer is 15 because 15*5=75 75-5 ( the 5 you got wrong) = 70

*June 19, 2016*

**math**

the answer is 30

*June 19, 2016*

**area of a circle**

What is the aera of the circle whose center is at (2,3) and that's tangent to x-axis?

*June 18, 2016*

**math**

How many possible points so that the x-coordinate an the y-coordinate are additive inverses of each other, and the differnce of the coordinates is 10.

*June 17, 2016*

**English**

Write a speech in the following situation- You are the leading actor in a school play It is the interval in the play. The first half was dreadful, with actors forgetting their lines, props falling over and the audience laughing for the wrong reasons..‟ Use a range of ...

*June 15, 2016*

**uncc**

A projectile fired at 30 degrees with a velocity if 15 m/s would have an x-velocity component of????m/s and a y-velocity component of????m/s. Please help.. thank you

*June 6, 2016*

**English**

Khianna is preparing an informational presentation for her science class. Her presentation discusses three different theories about what killed the dinosaurs 65 million years ago. The first theory is that an asteriod hit the earth, the second theory is climate change, and the ...

*June 3, 2016*

**5th Grade Math - Urgent Part II**

Peace

*June 2, 2016*

**Math**

9 + 10 = 21!!!!

*May 31, 2016*

**Topic**

I need an acrostic poem for the word PAGANISM. Can I have some help please?

*May 21, 2016*

**physical science**

John is using a pulley to lift the sail on his sailboat. The sail weighs 150 N, and he must lift it 4.0 m. How much work must be done on the sail?

*May 16, 2016*

**language arts**

Is it better or correct to write like this: A. "...would be the classic idea box..." or this? B. "...would be the classic, idea box..."

*May 16, 2016*

**6th grade math - Ms. Sue please check!**

You're right Lily Longoria

*May 13, 2016*

**Career Research and Decision Making**

A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise. A or B

*May 13, 2016*

**Career Research and Decision Making**

Mai is looking for a career that lets her travel and spend time in other countries. For Mai, work-related travel is:

*May 13, 2016*

**Career Research and Decision Making**

Maybe D

*May 13, 2016*

**Career Research and Decision Making**

bruce is trying to imagine the worst possible day on the job in order to help him figure out what he values at work. For bruce, this nightmare job scenario is: A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise.

*May 13, 2016*

**Career Research and Decision Making**

Thank you Ms.Sue

*May 13, 2016*

**Career Research and Decision Making**

A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise.

*May 13, 2016*

**Career Research and Decision Making**

jermaine wants to find a career that involves a lot of physical activety and risks. For jermaine exciting work is?

*May 13, 2016*

**science**

Which kind of energy transformation occurs when a skater's board falls back to the ramp?

*May 13, 2016*

**comprehension science**

how can a cyclist minimize friction as he or she rides?

*May 13, 2016*

**physics**

You throw a softball (of mass 300 g) straight up into the air. It reaches a maximum altitude of 17.9 m and then returns to you. What is the gravitational potential energy of the softball at its highest position? Assume the ball departed from and returned to ground level.

*May 12, 2016*

**Physics**

1234

*May 10, 2016*

**Career res & dec**

i think c

*May 10, 2016*

**Career res & dec**

Stella believes it is important to be able to stay at home with her children when they are sick or have a day off school. For Stella, spending tie with her children is: A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise.

*May 10, 2016*

**Linguistics**

type in: how to know if a syllable is stressed and click rymeweaver . c o m

*May 10, 2016*

**Math Help!!**

What is the answer i need it

*May 9, 2016*

**Civics**

Should we pay taxes why or why not?

*May 6, 2016*

**science**

thx also if your still here could you help the guy under me with his question about math?

*May 6, 2016*

**science**

why do we put salt on sidewalks when it snows?

*May 6, 2016*

**math**

The area of a triangle is 45cm and the altitude is 5cm greater than the base. Find the length of the base.

*May 5, 2016*

**English**

Well idk because the dialogue that was given is "Every night i think back over all this i did that day were wrong...like putting that wet mop in mr.dussel's bed...and this thing now with mother. i say to myself, that was wrong. i make up my mind, im never going to do ...

*May 4, 2016*

**English**

these lines of dialogue from the dairy of anne frank, act 1 reveal a lot about anne's character. In the paragraph , explain at least two things that you find out about anne's personality from her words. can someone start me out please im not good at essays

*May 4, 2016*

**Physics**

A steel cable of diameter 15mm supports a lift of total mass 1500kg. If the maximum safe working stress for steel is 10^8 N/m^2, calculate how the lift was moving when the wire broke

*May 4, 2016*

**Language arts, huge favor**

PLEASE TELLL ME IF THESE FRICTION ANSWERS R FRICTION CORRECT

*May 3, 2016*

**Economics**

A monopoly firm faces a demand curve given by the following equation: P = $500 − 10Q, where Q equals quantity sold per day. Its marginal cost curve is MC = $100 per day. Assume that the firm faces no fixed cost. You may wish to arrive at the answers mathematically, or ...

*May 3, 2016*

**math**

i do not know

*April 29, 2016*

**math**

Pedro pours 3 pints of iced tea into separate containers that can hold 1/2 pits of iced tea. how much iced tea Pedro had.

*April 29, 2016*

**Science**

In a series circuit if the circuit resistance is 560ohms and the inductive reactance is 1200ohms, what would be the voltage drop across the inductor

*April 27, 2016*

**PreCal**

Express the set W = { x ∣ | x | < 1 } using interval notation.

*April 25, 2016*

**PreCal**

Express the set W={x∣0<x<8} using interval notation.

*April 25, 2016*

**PreCal**

Express the setW={x∣x>2} using interval notation.

*April 25, 2016*

**PreCal**

Over a 5 week period, the price of an MP3 player dropped steadily, from $140 to $90. What was the average weekly change in the price of the MP3 player over this period?

*April 25, 2016*

**physics question help plz!**

1-What is the shape of the trajectory of a charged particle moving in a uniform electric field if its initial velocity is null? 2-What is the shape of the trajectory of a charged particle moving in a uniform electric field if its initial velocity is perpendicular to the field...

*April 21, 2016*

**physics question**

1-What is the shape of the trajectory of a charged particle moving in a uniform electric field if its initial velocity is null? 2-What is the shape of the trajectory of a charged particle moving in a uniform electric field if its initial velocity is perpendicular to the field...

*April 21, 2016*

**Math**

I have no idea. Sorry :(

*April 20, 2016*

**Math**

One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be combined to produce a 30 pound alloy that is 1 part iron to 1 part silver?Please show me how to do this

*April 14, 2016*

**calculus 1**

L=22.360 W=44.722

*April 13, 2016*

**accounting**

98000

*April 12, 2016*

**science**

what was the answers?

*April 12, 2016*

**Math**

What is 18 millionths written in standard form

*April 11, 2016*

**math**

x<0 or x>0 what's another way of expressing it in perfect square terms?

*April 8, 2016*

**Physics**

A 5.8 kg object is accelerated from rest to a speed of 53.3 m/s in 55 s. What average force was exerted on the ob- ject during this period of acceleration? Answer in units of N.

*April 7, 2016*

**Art**

Is it not b?

*March 31, 2016*

**Math**

We can't help you if not all information is present. If we see the whole question, we can provide a more accurate response to which will benefit you. Ms. Sue is correct; this post is insufficient.

*March 22, 2016*

**physics**

Displacement is a vector quantity that describes the shortest path between two points!

*March 22, 2016*

**physics**

You see some management students getting drunk at 1 PM in the quad. (Yes, this is an early wake up call for them.) You decide to tie a 2.00 daN water balloon on the end of a 1.00 m long light rope and start swinging it horizontally. The rope from your hand to the water balloon...

*March 22, 2016*

**astronomy**

On Earth, an astronaut weighs about 600 Newtons. The mass of the Earth is about 6 x 1024 kg, and the radius of the Earth is about 6.4 x 106 m. Suppose the astronaut climbs a ladder to a height of one Earth radius above the Earth. What is the new weight of the astronaut? please...

*March 21, 2016*

**Physics**

Above Answer is wrong

*March 21, 2016*

**Math**

10/16 * 1/15 = 1/24

*March 19, 2016*

**physics**

what is the heat capacity of a gold ring that has a mass of 7.00g

*March 18, 2016*

**Physics**

Suppose the 480 lbs pile driver that drops 20 ft drives the pile 2.0 in. every time it strikes the pile. What is the average resisting force of the ground where the pile is driven? Answer: 57,600 lbs Show Work

*March 18, 2016*

**Physics**

A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. For a soft board, the bullet goes through the board and emerges with a speed of 50 m/s. What was the average force exerted on the bullet by the board? Answer= 27344 N Show Work

*March 18, 2016*

**Maths**

9.6

*March 14, 2016*

**Maths**

9.9 rounding to the nearest meter

*March 14, 2016*

**Math**

160

*March 14, 2016*

**English-poem help**

Is the poem I wrote a sonnet? My aunt has cancer, i don't know how, i sit and wonder why. I get mad at God and often say i hate him. I know its not his fault, but who am i supposed to blame, its all just bad shame. I walk to see her on her bed, in pain, holding on to her ...

*March 13, 2016*

**Physics**

A falling rock has a speed of 1.5 m/s. What is the velocity of the rock when it hits the ground 5 seconds later? Give the magnitude and direction

*March 13, 2016*

**math**

Hillary has to drive 225 miles in four and a half hours. What should her average speed be in order to arrive on time?

*March 9, 2016*

**History**

YOUR A TEACHER AND YOUR TELLING A STUDENT NO YOUR ON YOUR OWN. EHHH

*March 8, 2016*

**Algebra**

10 days, because the x of the vertex is the maximum profit

*March 6, 2016*

**math help pls pls pls**

suck it math

*March 4, 2016*

**Art World Culture**

butthole

*March 4, 2016*

**math**

What is 6x to the third power+3x to the second power -9x

*March 1, 2016*

**math**

A deck of cards are shuffled 20 times. You are dealt 12 cards at random: what is the probability that all 12 cards are black? or what is the probability that all 12 cards are kings, queens or jacks

*February 25, 2016*

**physics**

butthole

*February 18, 2016*

**socialstudies**

Yes100

*February 14, 2016*

**Physics**

idk bro

*February 13, 2016*

**algebra**

34 - x - (x-1) 34 - x + x + 1 34 - 2x + 1 35 - 2x correct?

*February 13, 2016*

**algebra**

^ where do you get the 35 and 2x?

*February 13, 2016*