87,112 results, page 94

### Math 222

I need someone to check this to see if I am doing it correctly. k^3+k k^2+k-42 k(k^2+1) (k+7)(k+6) k=-7 k=6 (-0,-7)(-7,6) (6,0)

### Math

add or subtract. P.s this is a polynomial. (2x^2 + 6x + 1) + (-7x^2 + 2x - 3) A. -9x^2 -8x + 2 B. 5x^2 + 8x - 2*** C. 5x^2 - 8x + 2 D. 5x^2 -4x -2 i choose B. check please

### math

y-x=1 2x-y=1 changing it to y y=-x+1 y=2x-1 can someone check if I did it right? If not, please correct me.

### Algebra 2

Solve each equation for the variable. Check your solutions, if possible. x/2+1=6

### Math

which of the following expression is true? 2^4*2^3=2^12 3^3*3^6>3^8 4^2*4^2>4^4 5^5*5^2=5^10 i think is the c but please check for me.

Ravenous and cavernous italicized meaning is

### Probability (check)

In how many ways can 2 singers be selected from 4 who came to an audition? a. 6 b. 2 c. 12 d. 4****

### Math

7/8-5/12= 21/24-10/24=11/24 Can you check to see if I did this right and if not can you help me figure it out. Thank you for all your help.

### math or chemistry

Check pls. 5.4 x 10^-2 by 2.5 x 10^-3 by 7.9 x10^-3 m volume = 107.44 x 10^-8 m^3

### chemistry (charges)

just want to check if this group is neutral, R-NH2 thanks!

(13-2)squared + (14-12 divided by 3) (11 * 11) + -.6 121+ -.6 =120.4

### Math

Find the area of the following rectangles. 7/2 mm ×14/5 mm. I can up with 98/10 mm. Please check

### Math

Find each sum or difference -1/2 - 3/4 A.-1/6 B.-1/3 C.2/3 D.1/6 Im thinking D. but can someone check for me

### Math

Write 3 16/25 as a percent. A)3.64% B)3.80% C)364% D)380% I think A. Can you check? THANKS

### chemistry

I need help with this question please help, I just don't understand it Fe3+ (aq), Ca2+ (aq) and Ba2+ are all present in the same solution. Fully describe a procedure whereby you could separate these ions from one another Mr Pursley posted this response, but I don't understand ...

### "le Chat. principle".

Hey, can you check this, this is regarding "le Chat. principle". Thanks! #1) The value of the equilibrium constant for the reaction H2CO3(aq) + energy >>> H2O(l) + CO2(g) can be changed by introducing a change to which component of the equation? My answer: It would ...

### Check Work

A poll was taken of 10,439 working adults aged 40-70 to determine their level of education. The participants were classified by sex and by level of education. The results are shown below. Education Level Male Female Total High School or Less 2023 3264 5287 Bachelor's Degree ...

### chemistry

If a chemistry student collected 825 mL of gas at 25 degrees C and 7.90*10^2torr, how many moles did she collect? PV=nRT Put P in atmospheres. torr/760 = atm. V is volume (in LITERS.) solve for n, the number of mols. R is a constant of 0.08206 L*atm/mol*K T is temperature in ...

### Calculus

As part of a fitness program, Annie walks for 35 mins on day 1, and increases the walking time by 8 mins each day. She completes the fitness program on the day she first spends more than 3 hours walking. The program is completed on what day? This is how I did it. 3 hours would...

At 3 p.m., Brunhilde headed north at 30 kilometers per hour. Two hours later Ludwig headed south at 40 kilometers per hour. At what time will they be 340 kilometers apart? I know that the distance from Brunhilde(Db) plus the distance from Ludwig(Dl) is equal to 340, which is ...

### Physics with Calculus

The system shown in the figure is in static equilibrium. The rod of length L and mass M is held in an unpright position. The top of the rod is tied to a fixed vertical surface by a string, and a force F is applied at the midpoint of the rod. The coefficient of static friction ...

### Math

Hello, I need to know if I have the right answers to these questions. 2x-y=3 question is which of the following points lie on the line. is the answer 0,3 (-1,1) (2, 1) (-3, 1) (-3, ) or (1, 2) I chose the answer (-3, 1) is that right, second question: If x+7andY+2 then x-3y= ...

### math

On a TV game show, a contestant makes \$800 for every correct answer but loses \$500 for every wrong answer. After answering 26 questions, Sarah broke even. How many questions did she answer correctly?

### MATH

On a TV game show, a contestant makes \$600 for every correct answer but loses \$500 for every wrong answer. After answering 22 questions, Sarah broke even. How many questions did she answer correctly?

### math

first multiply first 2 digits, wrire answer side by then multiply1st and 3rd digits write answer next to earlier answer. Then add both answers and minus middle digit of the question

### Physics

a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s? I keep getting the answer 34.3m/s but it is counted wrong. I found an answer on Chegg that say 29.4 m/s but I can't figure out how they are getting that answer.

### Calculus

I finished this problem but I wanted some feedback because I don't know if it's entirely correct. Suppose that functions f and g and their derivatives with respect to x have the following values at x=2. f(x)=8 g(x)=2 f'(x)=1/3 g'(x)=-3 Find d/dx of f(g(x)) at x=2. I know the ...

### ethnic class

I need help in answering these questions. Please help me answer and get a good understanding as of why so i can keep reviewing for my final exam. The exam won't be till 3months from now but i truelly want to understand the concept of these answers of what they are. 1. Did ...

1. which is a rule that describes the translation of point from (-5, 4) to (-1, 2) A (x,y) --> (x - 4, y - 2) B (x,y) --> (x + 4, y - 2) (my answer) C (x,y) --> (x + 4, y + 2) D (x,y) --> (x - 4, y + 2) 2. the ordered pairs (2, -17) and (5, -35) are solutions to ...

### chemistry

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X 10-3 E. 0.223 eliminated down to b or d but ...

### chemistry

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X 10-3 E. 0.223 eliminated down to b or d but ...

### Physics

Pick whether each statement is true or false. ------------------------------------------- A liquid is more compressible than a gas. -- My Answer: False A fluid can do work on a solid object. -- My Answer: True Both liquids and gasses are fluids. -- My Answer: True The force ...

### Calculus

The radius of a conical tank is 2.7 meters and the height of the tank is 4.3 meters. Water is flowing into the tank at a constant rate of 59.5 m3/minute. At the instant the the depth of the water is 0.6 meters, answer the following: (A) At what rate is the depth of the water ...

### calculus

An Olympic athlete is standing at the edge of one side of a 3.7km wide river and wants to reach the point 7.4km downstream just along the edge of the opposite side. For this entire 7.4km stretch, the river is completely straight. The velocity of the current is negligible. The ...

### algebra--distributive

how would you do this prob. negative4-(5y+6) = negative 7y+3 thanks. happy halloween I'm going to assume your problem is this: -4 - (5y + 6) = -7y + 3 If that's the case, distribute the negative over the terms in the parentheses first: -4 - 5y - 6 = -7y + 3 Combine like terms...

### to dr bob..chemistry

bottle of wine contains 13.1% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent _______% molality ______mol/kg Thanks Responses AP CHEMMMM - DrBob222, Saturday, ...

### Mathematics/pre-algerbra

how do I find a value of x that will make each proportion true?? 12 = x ___ ___ 16 20 and 8 = 14 __ ___ 12 x See previous post. i still don't get it sorry Cross multiply to find x. Here's the first one; perhaps you can try the second one on your own. 12/16 = x/20 Take 12 * 20...

Can someone check my work please? 1. In general, what happened to the price of sugar and rum between April and September 1777? The prices went up extremely high and that's what begin of the Boston tea party incident. 2.Why was this happening? Because they didn't have much of ...

### Calculus Help

The deal your assistant signs calls for the sale of a minimum of 260 chairs and up to 410 chairs. The price will be \$88 per chair if only 260 chairs are bought, but will be discounted by \$0.2 per chair (on the entire order) for every chair ordered in addition to the minimum. ...

### Statiatics

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered neither of the problems correctly? Do not round your ...

### math

identify all of the basic trig functions that fit each description. 1) is negative for angles in the 2nd and 4th quadrant 2) is unbounded answer: tan, cot 3) has a range of -1 ≤ y ≤ 1 answer: sin, cos are my answers correct? and i'm not sure what the answer to ...

### Chemistry

2CH3OH(l)+3O2(g)-->2CO2(g)+4H20 +1350 kj 1. What mass of water could be heated from 20.0 C to 35 C,by burning 48g of methanol? This is what I did, no answer was given so I want to double check. so q=mcT change in H=n(molar enthalpy) c= 4.184 kj/(kg C) So what I did was ...

### calculus

(1 pt) The acceleration due to gravity, g, is given by g = (G*M)/(r^2) where M is the mass of the Earth, r is the distance from the center of the Earth, and G is the uniform gravitational constant. (a) Suppose that we change from our distance from the center of the Earth by a ...

### chem

How much heat is required to raise the temperature of 200 g CH3OH from 20 to 30 degrees and then vaporize it at 30 degrees. The molar heat capacity of CH3OH is 81.1 J/Mol/K. Okay...the answer is approximately around 254. It was a homework problem. The question is how do you ...

### Calculus

Q: If y=sinx/(1+tanx), find value of x not greater than pi, corresponding to maxima or minima value of y. I have proceeded thus- Equating dy/dx=0 we get{ (1+tanx)cosx-sinx.sec^2 x}/(1+tanx)^2=0……..(A) Or cosx+sinx=sinx.sec^2 x or cosx= sinx.sec^2-sinx Or cosx=sinx.tan^2 x=...

Use g=10 N/kg in this assignment. 1. What is the gravitational energy (relative to the unstretched surface of the trampoline) of the 20 kg ball at its apex 2 m above the trampoline? I got 400 J 2. What is the kinetic energy of the ball just before impacting the trampoline? I ...

### social studies

I need help check my answers. the * stands for my answer on 1 and 2 I have to answers cause im not sure if the answer is wrong I will put the 2nd answer later. 1. which of the following best describes daily life in the south during the civil war? about the same as before the ...

### English

Scientists report (1) THAT CREATURES LIVING IN THE DEEP SEA ARE IN DANGER OF STARVING TO DEATH. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are suffering from growing food shortages. Which may be a result of rising sea temperatures. ...

### Trigonometry

How do you simplify: (1/(sin^2x-cos^2x))-(2/cosx-sinx)? I tried factoring and creating a LCD of (sinx+cosx)(sinx cosx) (cosx-sinx), but cannot come up with the right answer. The answer is (1+2sinx+2cosx)/sin^2x+cos^2x,but I don't know how the book arrived at that answer. I'd ...

### algebra

1)Identify the y-intercept and the axis of symemetry for the graph of f(x)=-3x^2+6x+12. answer=12:x=1 2)Determine whether f(x)=-5x^2-10x+6 has a maximum or minimum value and find that value. answer=maximum -1 3)Solve x^2=4x by graphing and indicate the roots. answer=0,4 4)...

### Inorganic Chemistry

The atoms in barium metal are arranged in a body centered cubic unit cell. Calculate the radius of a barium atom in A if the density of barium is 3.50g/cm3. The atomic weight of barium is 137.34. The atoms in barium metal are arranged in a body centered cubic unit cell. ...

### Calculus

Factor the following: y = (x-a)^5 . (x-c)^5 . (a-c)^5 It looks already factored to me

### Calculus

If f(x) is a continuous function, find the constants a and b such that f(x) = { -x -3 <= x <= -2 ax^2 + b -2<x<0 b x=0

### Calculus

q=(1000/p+1)^2 - 1 find q' I will be happy to critique your thinking.

### calculus

integrate ((x^3/6)+(1/(2x)))*squareroot of 1+(x^4/4)+(1/4x^2)-1/2..plz help me...tnx in advance!

### calculus

does anyone know the shortcut to finding the derivative of a function for example: x^3-3x^2

### pre calculus

how do you tell if a function is even or odd?

### Calculus

Find an equation for the tangent and normal to the curve x^2 + y^2 = 9 at x=1

### Calculus Test Question!!!!!

Find the derivative if y=x^1+sqrt2

### calculus

how do I find the range of a natural log like ln | x/(1+x^2) |

### calculus

f(x)=(y+a)and b=the limit as y aproches 2+f=1000. I need to know what y and a equal.

### CALCULUS 1

Find dL/dx set to zero. Solve for x. (27+x)/x * sqrt(64+x^2)

### Calculus

Find the average value of f(t)=-2te^(-t^2) on the interval [0,3]

### Calculus

Is thsi a solution of an ordered pair (4, -1) 4x = -17 - y 2x = -12 -4y I say yes ? Is this how you do it. 4(4) = -17 - -1 = 2(4) = -12 - 4(-1)

### calculus

calculate the indefinite integral (cosx)/(sin^3x)

### calculus

Find the sum of the series: 10 + 14 + 18 + 22 +...+138 and 6-12+24-48+96-...+1536

### calculus

integrate (x+2)/((x^2+2x+4)^2) the usual partial fractions don't work???

### Calculus

two complex numbers Z and W are related by the formula W=(Z+1)/(1-Z) what is W if Z=1.5i? thanks for the help!

### calculus

how to you use partial fractions to compute the integral of ax/((x^2)-bx)dx?

### calculus

does the series from n=1 to infinity of 1/arctan(2n) converge? I said yes but I didn't know what to

### Calculus

Can someone please tell me how to derive V=4/3pi(r)^3 to get x^2+y^2=r^2?

### Pre-Calculus

how do u state the period of a function? for ex. f(x)=sin((1/2)x)

### calculus

solve the following differential equation: y' + (y)tanh(x) - 2e^x = 0

### Calculus

Find the point where the tangent to the curve is horizontal. f(x) = (x^2-2x+4)/(x^2+4)

### Calculus

Find the equation of the tangent to the curve y=e^x at the point where x=-1.

### Calculus

What is the derivative of y = ln 3x2? a) y' = 2/x b) y' = ln 6x c) y' = 2 ln3 d) y' = e6x I think it's d.) Thanks.

### Pre-Calculus

What is the Domain and Range of the function: Y=sin2x+4?

### Calculus

Find the derivative of Integral from -5 to sin(x) of cos(t^3)+t

### calculus

What is the domain for y=sqrt((x)/(x-1))? Can anyone please teach me how to do it? THANKS A LOT!

### calculus

find the x-values at which f is not continuous. which of the discontinuities are removable? f(x)=1/(x^2+1)

### Pre-Calculus

Directions: Find the 2 Functions f and g such that (f o g)(x)= h(x). 1. h(x)=(2x+1)^2

### calculus

If we know that for a function, f(x), that f(2) = 6 and f(5) = 1, what is the average rate of change of f(x) on the interval [2,5]?

### calculus

Evaluate the following limit: lim x --> 2 sqrt(x^2 - x)/(2x - 3)

### calculus

find all x,y intercepts of x+6/x-3 show work

### calculus

find all intercepts x^2-4/x-1 show work

### 12th AP Calculus

use implicit differentiation to find dy/dx and then d^2y/dx^2 x^2/3 + y^2/3 = 1

### calculus HS

Analtical method to evaluate Lim X -> -infinite

### calculus

are the deritives of sin and cos functions inverses

### Calculus

Find the maximum and minimum values of f(x,y,z)=x+4y+5z on the sphere x^2+y^2+z^2=1.

### Calculus

Limit as x goes to negative infinity of sqrt(x^2+3x)+x?

### calculus

f(x)=x^3/(x^2-1) find the regions of concavity and inflection points

### calculus

Use the Midpoint Rule to approximate the integral (5x-9x^2)dx from 6 to 15

### Calculus

Solve for the function y. dy/dx = xe^y, when y(1)=0 I got as far as: e^-y dy = x dx But then how do you continue from there?

### Calculus

Find the area between the two curves f(x)= ln(x+1)+2 g(x)= x^2-8x+12

### CALCULUS

AN EQUATION OF THE LINE NORMAL TO THE GRAPH OF Y= SQRT[3X^2 + 2X] AT (2, 4) IS??

### Calculus

I rewrote the quesion y = sqrt (4 + sin 10x)