# Posts by becky

Total # Posts: 688

math(algebra)
D. 1.99(x-4) + 11.96 Because you can figure out the total cost of the four costing \$2.99 (11.96), that has to be added to the other half of the equation. Simply multiplying 1.99 by x would include all apps instead of just the remaining (x-4).

Which of the following words most likly comes for africa? A.boutique B.safari C.violin D.allegro i pick B.

help me with this language arts.

chemistry
458.03

geometry
triangle GHE GH=10 HE = 17 hypotenuse GE =21 HF is an altitude Find HF

math
Whoops! it's suppose to be -3 squareroot 426!

math
-3ã426 What's the answer? Thanks! :)

science
Guys Ttng is right i got 100%

English
Ms. Sue is a useless prick

Sentence Agreement Errors
What agreement error would this sentence be? One of the options concerning his future surgeries were discussed with him. Verb tense agreement error, subject/verb agreement error, pronoun agreement error, modifier placement error or parallel structure error

Maths
Anybody know what to do??

Maths

Maths
Jacob buys a car with 7,000 miles on it. He drives an average of 220 miles a week. Write an equation to represent the number of miles, m, on the car after any number of weeks, w. Explain each part of the equation. Thanks so much!!! :)

Chemistry
Yes, I just copied the equation off of a different problem. Thank you for your help!

Chemistry
k = 0.693/t1/2 ln(No/N) = kt No = 100 N = 65.7 k from above. solve for t in years. I found this equations, but my question is what is k?

Chemistry
Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years. A rock is found to contain 82.7% of the amount of uranium-238 that it ...

math
the half life of the carbon isotope C14 is about 5700 years. A. about how many years does it take 1000 grams of this substance to decay to 500 grams? B. about what percent of the original amount would you expect to find after 1000 years?

physics
A 74 kg box rests on a level surface. The coefficient of static friction, µS = 1.1 and the coefficient of kinetic friction, µK = 0.7 . What is the magnitude of Friction on the box from the surface?

Geometry
D- The volume of the larger prism is 64 times the volume of the smaller prism.

grammar
In Which oneof the following sentences is the number written correctly? A.the parcel of land was advertised as two hundred forty-three and three-quarters acres.b.the college has an,endowment of more than \$187million.c.john just paid \$33 thousand forhis New car.d.one hundred ...

Algebra
A \$130,000 home bought with a 20% down payment and the balance financed for 30 years at 7.5% Find the monthly payment for the loan

CENCEPTS IN HEALTHCARE
what is the procedures and resources available for assisting patients who use English as a second language, who is hearing impaired, sight impaired, or who have any other type of physical or diversity related disposition that should be addressed to provide quality care to that...

chemistry
i have never used the ice table before so i think its basic class. so do i just add those 2 numbers together? Thanks DrBob

chemistry
What is the hydrogen ion concentration, in mol dm−3, when 2.00 g of sulfuric acid is dissolved in water to give 0.400 dm3 of solution? could you explain in a simple and clear way please because im not very good at chemistry. thanks in advance

PreCalculus
Sin5x cos2x + cos5x sin2x=

geometry
were did you show me I don't have anything

geometry
How much more pizza is in a 12-in. diameter pizza than an 8-in. diameter pizza? Round your answer to the nearest hundredth. Be sure to show all work and label your answer. TWO points for the work...TWO points for the corrrect answer

geometry
4.2

social studies
making laws

social studies
The main work of representatives in a parliament is a.running trials b.trining an army c. kkeeping the peace d.making laws

Physics (Algebra-based)
A barefoot field-goal kicker imparts a speed of 35 m/s to a football initially at rest. If the football has a mass of 0.39 kg and the time of contact with the ball is 0.038 s, what is the force exerted by the ball on the kicker’s foot? I tried the formula F=(m(vf-vi))/...

physics
An elevator has a mass of 500 kg. It may safely carry an additional mass of 1000kg and accelerate upward at 2m/s2. What is the tension in the cable?

Physics (Algebra-based)
Thank you!

Physics (Algebra-based)
A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section of the track.It leaves the track horizontally, flies through the air, and subsequently strikes the ground. gravity= 9.81 m/s^2. height1=4.1m---- is initially ...

help
If you triple 4 and subtract 2 each day, how many days until you have zero?*

math
10

math
10 pounds

Physics (Algerbra-based)
Thank you!

Physics (Algerbra-based)
A particle is moving clockwise around a circle with a radius 3.31 m. The magnitude of the total acceleration of the particle at the given instant is 14.3 m/s^2; the angle between the vector of total acceleration and the radius-vector of the particle is 30◦. Find the ...

Math
David has 50 bills in his wallet worth \$400 all fives and tens dollar bills. How many of each bill does he have

algebra
A line with a slope of -2 passes through the point (1, 7). What is the closest point on the line above (1, 7) which has whole number coordinates?

Geography
Would outdoor locations in countries such as Singapore with the highest temperatures also have the highest relative humidities? Explain 2 reasons? Would outdoor locations in countries such as Singapore with the highest temperatures necessarily have the highest dew point ...

Math
A bag contains two blue, three purple, four yellow, two red, three green and one orange marbles. What is the conditional probability that, without replacement, the second marble is purple given that the first marble was green?

science
describe how matter cycles through an ecosystem

Calculus
Find the derivative of m(x)=1/(x+1) by using the definition of the derivative.

Calculus
k=+/- 8 I figured it out.

Calculus
It is supposed to be x^2-k^2 over x-8 And the limit is 8

Calculus
Find a value of the constant k such that the limit exists. x^2-k^2 lim _________ x->8 x-8 k=+/_

algebra
^^^^100%^^^^

Pre-Calculus
An Alfa Romeo going at 70 mph requires 169 feet to stop. Assuming that the stopping distance is proportional to the square of velocity, find the stopping distances required by an Alfa Romeo going at 35 mph and at 140 mph (its top speed).

Pre-Calculus
A pomegranate is thrown from a ground level straight up into the air at time t = 0 with velocity 67 feet per second. Its height at time t seconds is f(t)=-16^2+67t. (a) Find the time it hits the ground and (b) the time it reaches its highest point. (c) What is the maximum ...

Pre-Calculus
For a boat to float in a tidal bay, the water must be at least 2.5 meters deep. The depth of the water around the boat, d(t), in meters, where t is measured in hours since midnight, is d(t)=5+4.6sin(0.5t) Use three decimal places in all intermediate calculations. (a) What is ...

Pre-Calculus
Find a solution to the equation if possible. Give the answer in exact form and in decimal form rounded to three decimal places. 1=21tan(2x+2)-6

30/100 = 3/10

Pre-Calculus
The exponential function y(x)=Ce^ax satisfies the conditions y(0)=6 and y(1)=7. (a) Find the constants C and a. Enter the exact value of a. (b) Find y(2). Enter the exact answer. Simplify the answer so it does not contain any logarithms.

Pre-Calculus
At time t hours after taking the cough suppressant hydrocodone bitartrate, the amount A, in mg, remaining in the body is given by A=13(0.82)^t. a) What was the initial amount taken? b) What percent of the drug leaves the body each hour? c) How much of the drug is left in the ...

math
Chord BC is drawn in a circle with a radius of 3cm. Chord BS is 4cm long. Find the perpendicular distance from A to chord BC

Early Child Educ.
the newest organization to accredit afterschool programs is the

Appreciate if you could help me answering the following questions! thank you!! How would you prepare a 20% homogenate from a 2.0g of liver using 0.25M sucrose? why is it necessary to cool the homogenate during homogenization?

Biochemistry
Appreciate if you could help me answering the following questions! thank you!! How would you prepare a 20% homogenate from a 2.0g of liver using 0.25M sucrose? why is it necessary to cool the homogenate during homogenization?

Chemestry
Find the molarity of a solution containing 0.75 mol of NaCl with a volume of 1.5 L.

Math
Ella walked 4.5 km/h to her friends house. She walked back home from her friends house at 3.5 km/h. She walked a total of 40 minutes. How many minutes was her walk on her way to her friends house?

english
8/8 (100%) ^^^^^^^^^^

algebra
my scenario, to start a small business you will need a loan of \$50.000 to purchase the restaurant. The bank interest rate 9% that compounds monthly for 7 years. What is the monthly payment for this loan, what is the fomula that you will use and the values for each variable to ...

algebra
a small business loan in the amount of 50,000 need to interest rate of 9% that compounds monthly for 7 years. What is the payment for 7 years, need formula for this. And what is the balance of the loan at the end of the 1st year? Show the formula used for each variable and the...

CALC #
Use Green's Theorem to evaluate F · dr. C (Check the orientation of the curve before applying the theorem.) F(x, y) = y cos x − xy sin x, xy + x cos x , C is the triangle from (0, 0) to (0, 12) to (3, 0) to (0, 0)

math
how do you figure out the diameter of a pipe that is 40 feet high and holds 200000 gallons

Chemistry
thank you!!

Chemistry
someone help pls!! percentage of ethanol in the "blood" sample on a v/v basis is 0.0143% v/v. is the "blood" sample analysed over the limit for driving? (legal limit is 80mg alcohol per 100mL blood. assume the density of ethanol is 0.785g/mL and the density...

Algebra
4ã(50x)+3ã(2x)+ã(72x) Combine. Assume that all variables represent nonnegative real numbers.

Calc 3
The DNA molecule has the shape of a double helix. The radius of each helix is about 10 angstroms (1 Å = 10−8 cm). Each helix rises about 34 Å during each complete turn, and there are about 2.9 × 108 complete turns. Estimate the length of each helix. (...

no you have to use lagrange multipliers to do it and i figured out all five equations but i can not solve any of them

Find the maximum and minimum volumes of a rectangular box whose surface area is 1300 cm2 and whose total edge length is 200 cm.

Calc 3
If a function of one variable is continuous on an interval and has only one critical number, then a local maximum has to be an absolute maximum. But this is not true for functions of two variables. Show that the function f(x,y)= 3xe^y − x^3 − e^(3y )has exactly one...

Math
The base of an isosceles triangle is one inch shorter than the equal sides, and the altitude of the triangle is two inches shorter than the equal sides. What is the length of the equal sides?

chemistry
Identify a haloalkane and describe the manner in which it functions as an anesthetic.

Calc 3
Find parametric equations for the tangent line to the curve of intersection of the paraboloid z = x^2 + y^2 and the ellipsoid 6x^2 + 5y^2 + 7z^2 = 39 at the point (−1, 1, 2)

Calc 3
can you please explain to me where you got the numbers for T(-1,1,2) I know you did the cross product but I can not seem to get the same numbers as you. Please explain

Calc 3
Find parametric equations for the tangent line to the curve of intersection of the paraboloid z = x2 + y2 and the ellipsoid 6x2 + 5y2 + 7z2 = 39 at the point (−1, 1, 2)

Calc 3
At what point on the paraboloid y = x2 + z2 is the tangent plane parallel to the plane 7x + 2y + 3z = 2? (If an answer does not exist, enter DNE.)

Lang Arts
Would #2 be A?

ENGLISH
How I am wrong you noob? this is from CCA!!

ENGLISH
100%^^^ AND 11. ESSAY 12. ESSAY

ENGLISH
LESSON 12: EARLY AMERICAN AND COLONIAL LITERATURE TEST UNIT:1 1. A 2. E 3. C 4. F 5. D 6. C 7. C 8. B 9. C 10.B

physics
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 = 3.8 kg and m2 = 9.2 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor?

physics
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 = 3.8 kg and m2 = 9.2 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor?

Calc 3
thank you!!!!!!

Calc 3
Use the Chain Rule to find ∂z/∂s and ∂z/∂t. z = tan(u/v), u = 7s + 4t, v = 4s − 7t

Calc 3
we were not given f(x,y) the whole problem is listed above, apparently there is a link that is supposed to help us but I followed it and don't know what I am doing wrong and I cannot post the link because it is on a special homework website.

Calc 3
If z = f(x, y), where x = r^2 + s^2 and y = 8rs, find ∂^2z/(∂r ∂s).

calc 3
yes i already got parts a and b i do not know how to do part c sorry i should have specified that in my post

calc 3
The length script l, width w, and height h of a box change with time. At a certain instant the dimensions are script l = 7 m and w = h = 5 m, and script l and w are increasing at a rate of 6 m/s while h is decreasing at a rate of 4 m/s. At that instant find the rates at which ...

English
1.I started play the oboe because [I've heard] it was a challenging instrument (a) no change (b) I'd have heard (c)I've been hearing (d) I'd heard 2. That was [four years ago and, I've] enjoyed learning to play (f) no change (g) four years ago, and I've...

physics
A crate of potatoes of mass 13.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.76 and μk = 0.35. Find the frictional force (magnitude and direction) on the crate if the crate is sliding up the ramp.

calc 3
Use the Chain Rule to find dw/dt. w = ln (x^2 + y^2 + z^2)^.5 , x = 9 sin t, y = 6 cos t, z = 7 tan t

Calc 3
Find all partial derivatives? v = (xy)/(x-y) vxx= vxy= vyx= vyy=

physics
A barge is hauled along a straight-line section of canal by two horses harnessed to tow ropes and walking along the tow paths on either side of the canal. Each horse pulls with a force of 540 N at an angle of 12° with the centerline of the canal. What is the net force on ...

calc 3
Find all partial derivatives? v = (xy)/(x-y) vxx= vxy= vyx= vyy=

calc 3
Use polar coordinates to find the limit. [If (r, θ) are polar coordinates of the point (x, y) with r ≥ 0, note that r → 0+ as (x, y) → (0, 0).] (If an answer does not exist, enter DNE.) lim (x, y)→(0, 0) [(3e^−x^2− y^2) − 3]/ (x^2...

Calc 3
but there is no lHospitals rule in multivariable

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