# Posts by Jeff

Total # Posts: 821

**Math Check! FAST! VERY FAST PLZ!!!!!!!!!!!!!!**

I believe you are correct. The first time she chooses, her chances are 2/10 that she will get an I tile. With not replacing the tile, her second chance will be 1/9. Multiply the two fractions together gives 2/90 = 1/45

**Gr 12 Data**

Sarah tosses 5 coins, one after the other. a) How many different outcomes are possible? b) Draw a tree diagram to illustrate the different possibilities. c) In how many ways will the first coin turn up heads and the last coin turn up tails? d) In how many ways will the second...

**Maths**

Given that the line y=mx+c is a tangent to the circle (x-a)^2+(y-b)^2 = r^2 show that: (1-m^2)r^2=(c-b+ma)^2 Please Help and sorry for the inconvenience

**Maths**

show that the circles x^2 + y^2 - 10x - 8y + 18 = 0 and x^2 + y^2 - 8x - 4y + 14 = 0 do not intersect. Please

**Algebra**

You will need to have two equations with two unknowns. The first equation will be for the "In six years Jill will be twice as old as Amanda." and the second equation will be for the "One year ago Jill was nine times older than Amanda." So if you use J for ...

**physics**

What’s the direction of the electric field caused at the point (–2, 3) by an electron located at the origin?

**Social Studies**

Bam, dont be a jerk, TYSM answers are not correct :(

**Calculus**

At which point on the curve y = -2+2e^x is the tangent line parrellel to the line 3x-y=5? Just give the x-coordinate as an exact number

**Spanish**

Which would you use to say your friend is writing? estan escribiendo estoy escribiendo esta escribiendo estas escribiendo

**English**

Which of the following lines from a&p illustrates Dike's use of conflict?

**IPC**

if you throw a 0.145 kg baseball in 18 meters in 0.45 seconds, what is the magnitude of momentum of that baseball?

**Dating with Radioactivity**

thanks thruthoverload is 100%%%

**Calculus **

Consider the function f(x) = -3x+2. Notice the limit of f(x) as x approaches 1 is -1. Find a value for delta such that is the distance x is from 1 is less than delta, then the distance from f(x) to -1 is less than 0.05

**Biology**

I have a question on plant science, wondering where I can get the answer..

**math**

Determine whether the function is symmetric with respect to the y-axis, symmetric with respect to the x-axis, symmetric with respect to the origin, or none of these. y = -6x3 + 7x

**Math**

Thanks!

**Math**

For what real values of a is x^2 + ax + 25 the square of a binomial? If you find more than one, then list your values in increasing order, separated by commas. If you could help me, that would be great!

**Math**

the value of a machine depreciates every year by 5% .if the present value of the machine is 100000,what is the value after 2 years

**science**

Aluminium sulphate when dissolved in water forms aluminium hydroxide and sulphuric acid.Since, aluminium hydroxide is insoluble in water, a clear solution is not obtained. Al2(SO4)3 + 6H2O ?2Al(OH)3 + 3H2SO4 Aluminium Aluminiumsulphate Hydroxide

**Math**

Find the set of all z such that neither 2+z nor 2-z is in the interval (-1,1]. Express your answer as an interval or as a union of intervals.

**science**

determine the velocity of the truck if it starts from rest and accelerate at 2m/s² in 3.2s

**Math**

Find the distance between the x-intercept and the y-intercept of the graph of the equation 5x - 12y = 60.

**Math**

We need to make an open topped box with a square base and fixed volume of 8 cubic feet. The material for the base costs $ 6 per square foot and the material for the side costs $4 per square foot. Write a function for the cost as a function of the length and side of the base

**Math**

Joe has 18 mortals all the marbles are either black or gold there are four more gold marbles and black how many black marbles are there

**math**

he last time Nkechi was at school was on Saturday. She was first absent for four days before that. Today is Tuesday, 27th of September. When was Nkechi first absent? Give the day and date.

**astronomy**

69 hahahahaha

**Math**

22.01

**geometery**

In triangle ABC, the size of angle B is 55 times the size of angle A, and the size of angle C is 1111degrees° less than 44 times the size of angle A. Find the size of the angles.

**geometery**

A rectangle has a perimeter of 42 inches. The width of the rectangle is 3 inches less than 1/2 the length. What are the dimensions of this rectangle? Write your answer in the form "width, length

**geometry**

In triangle ABC, the size of angle B is 55 times the size of angle A, and the size of angle C is 1111degrees° less than 44 times the size of angle A. Find the size of the angles. thank you

**geometry**

A rectangle has a perimeter of 4242 inches. The width of the rectangle is 33 inches less than one half 1/2 the length. What are the dimensions of this rectangle? Write your answer in the form "width, length thank you

**math**

Wilcorp has 50 employees who work 40 hours a week and earn $20/hour. Fifteen employees each worked 4 hours of overtime at 50% above their hourly rate.

**math**

There are 21 students in 6M. 12 students play football, 16 students play cricket and there are 2 students who don't play either sport. How many play both sports?

**math**

there are 91 students that attend mass .this represents 70% of the students. how many students at mass

**Precalculus**

An item costs $12.00 in 2016 through an online retailer. Each year, the price will increase by 5% of the previous year’s price. A. Find the general rule for the sequence of the prices for this item. B. Determine what the price will be in 2030. C. If you buy one of these ...

**Math**

At the Cafe, a lunch of iced tea, a veggie burger, and fries costs $7.56, with the fries costing twice as much as the iced tea. Next week at the Cafe, the price of the iced tea will increase 10% and the price of the veggie burger will increase 25%. After the increase, the same...

**match**

If a lateral line ditch will store 800 gallons of water how long will it take for one inch of water to be absorbed?

**Math-Calc**

f(x)=7/(ln(x^2+5)) find f'(1) Cant seem to be getting the right answer. I believe can I get help finding the derivative.... thank you

**Math-probabilities**

The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths Passenger car occupant 13,...

**physics**

do your own homework

**life orientation**

advice the cyclists about the road eccidents

**Chemistry**

Why is the equivalence point pH of the HCl-TRIS titration = 4.6?

**Chemisty**

Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH units, how many measurements should you take between the addition of 5mL and 7.5mL of titrant, a) in the titration of a 10mL aliquot of standard 0.1500M TRIS base (Kb=1....

**math**

89m

**Physics**

A 3.0cm diameter crankshaft that is rotating at 2500 rpm comesto a halt in 1.5 s. a- what is the tangential acceleration of a ponit on thesurface? b-how many revolutions does the crankshaft make as itstops? For this question, what are the applicable concepts and/or laws and ...

**Math**

Determine the most probable next term in the following list of numbers. 1, 7, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 1, 7, 1, 1, 1, 1 The most probable next term is______

**Physics**

A wire is made of a material with a resistivity of 2.08184 × 10−8 Ω · m . It has length 4.42917 m and diameter 0.6763 mm . What is the resistance of the wire? Answer in units of Ω. Would you just use the equation R = PL /a?

**Math**

jk xd

**Math**

yo ur diek is as big as ur ego--> c=8 ^ Life size

**CHEMISTRY HELP**

If a/b = 10.23, what is a and what is b?

**CHEMISTRY**

Hi DrBob222, can you explain what you mean by "Solve the two equation simultaneously for a and b. I get something like 2 for acid and 23 for base." I don't know how you got that and what you started with. Thanks!

**CHEMISTRY**

1. What is 5/60? 2. How did you get 10.3 for b/a?

**CHEMISTRY**

Calculate the amount (in mL) of 1.520M NaOH that is required to add the following acetic acid solution to prepare a buffer with the corresponding pH: 30.00mL of a 5.00% (w/v%) acetic acid; the resulting acetate buffer has a pH of 5.75. pKa of acetic acid = 4.74

**physics**

A disc has a mass of 340kg, and is mounted to a frictionless axle and is free to rotate around it. Model the shape of the disc as a hollow shaft on axis where the inner and outer diameters are 600mm and 1200mm respectively. A wire is wrapped around the disk, and is the pulled ...

**Physics**

An arrow is shot from a height of 1.5 m toward a cliff of height . It is shot with a velocity of 30 m/s at an angle of 60 deg above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the maximum height reached by...

**Algebra**

Im to write a function,that showsthe total cost of b(x) to rent a car driven (x)miles

**Physics**

A gun is fired vertically into a 1.60 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 195 m/s, how high will the block rise into the air after the bullet becomes embedded in it?

**math**

how to break down 2 1/3-1 3/4

**Physics**

A 0.500 kg object is thrown vertically upward with an average applied force of 8.20 N by a student. The force is applied through a displacement of 1.50m. a. What is the average net force acting on the object? b. What is the velocity of the object when it leaves the student'...

**Math**

Yes, you are correct. 1 gal is 4 qts, so 300 gals = 1200 qts. So 600 qts is 50% of 1200 qts.

**probability**

There are 4 white socks and 4 black socks. You randomly divides socks into pairs. What is the probability that each pair consists of 2 socks of the same colour? Express answer as a fraction. I'm not really sure how to start this question.

**probability**

A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...

**probability**

A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...

**College Physics**

How much energy is required to bring 10.0 grams of ice at -5.00 degrees to 105-degree steam? Assume the system is isolated so that no mass is lost to the surroundings

**chem**

what are ways to increase the solubility of SnF2 at constant temperature and pressure. I think adding a strong acid will work not sure what else.

**Math**

A Ferris wheel has a radius of 30 feet and travels 3.6 feet every second. How long does it take for the Ferris wheel to complete one revolution?

**Social Studies**

philadelphia

**math**

Deez nuts goes in the banana factory please liek dis i want attention

**Math**

A manufacture has been selling 1400 television sets a week at $450 each. A market survey indicates that for each $14 rebate offered to a buyer, the number of sets sold will increase by 140 per week. a) Find the function representing the demand p(x) , where x is the number of ...

**Math**

The blood vascular system consists of blood vessels (arteries, arterioles, capillaries, and veins) that convey blood from the heart to the organs and back to the heart. This system should work so as to minimize the energy expended by the heart in pumping the blood. In ...

**Math**

A street light is at the top of a 16 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving along the ground when she is 30 ft from the base of the pole? How fast is the length of her ...

**chem**

Idk what the answer is does anyone know

**Alegebra**

I need some help just setting up an equation for this problem, I cannot figure it out. One train travels from A to B at 19mph. A second train travels from B to A at 21 mph. One hour before the trains pass each other, how far apart are they?

**Organic Chemistry**

How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the observed rotation...

**chemistry**

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.350 L of 0.290 M NaI? Assume the reaction goes to completion.

**math**

**** her in the *****

**Math**

3:30

**Physics help!!**

A plane is flying horizontally at constant speed, vo. when it releases a package. The package lands on the ground at t seconds later. Just before the package lands... a. What is its horizontal component of velocity? Leave in terms of vo and t. b. What is its vertical component...

**Chemistry**

.0000625

**Math**

If I have a random stack of 5 quarters, the 1st 3 quarters are heads. What is the probability the the 4th quarter would be another head What is the probability the the 4th quarter would be a tail Is there a way to show the probability or odds that you would continue to keep ...

**math**

this is hard

**english**

compare and contrast the words maneuver and manipulate

**Physics**

Thank you, but it did actually say meters haha

**Physics**

Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 44.6 degrees. The velocity of the second is 610 m/h at a heading of 100 degrees. How far apart are they after 2.3 h? Answer in units of m.

**Math**

9+10=21

**Physics**

A model rocket is launched from rest with an upward acceleration of 6.30 m/s2 and, due to a strong wind, a horizontal acceleration of 1.50 m/s2. How far is the rocket from the launch pad 5.30 s later when the rocket engine runs out of fuel?

**Culler middle school**

-4*3=

**language arts**

I guess just foods that are good for you

**language arts**

what are some examples of benign foods

**ENGLISH**

2)Writing 3)Checking for mistakes 4)revising

**statistics**

0.36

**algebra**

Susan is on her way home in her car. She has driven 24 miles so far, which is one-half of the way home. What is the total length of her drive?

**Algebra**

1 year

**Biology**

What is osmosis

**Further maths**

Show graphically the solution sets of the following inequalities: (a) X square - 7 * h2 > 0 (b) 3X square - 5X - 2 > 0

**Physics**

A 250kg car initially at rest was travelling with acceleration of 10m/s square. Calculate the kinetic energy after 3 seconds

**calculus check**

Find the limit as x approaches 3 of [(2x^3-5x^2+7)/(3sin(xpi/6)-cos(xpi))] When I plugged in 3, I got 4.

**math**

Raymond has four more sisters than Tyler.Write a number sentence to show Raymond=r tyler=t

**calculus**

If f(x)=the integral of (3x^2+2x+4) dx, find C if f(1)=10.

**physics**

A charge of -4.50 10-6 C is placed at a point in space where the electric field is directed toward the right and has a magnitude of 9.00 104 N/C. What are the magnitude and direction of the electrostatic force on this charge?