TutorCat

Use the Empirical Rule. http://www.oswego.edu/~srp/stats/6895997.htm

14 years ago

solve for x. (2x-3)=0 (x-5)=0 (4x+7)=0

14 years ago

http://www.algebralab.org/practice/practice.aspx?file=algebra_averageatomicmass.xml

14 years ago

It is 136. check your work!

15 years ago

It is 136. Check your work!

15 years ago

136 is correct. Check your work.

15 years ago

no, it is the takeoff speed of 45 m/s

15 years ago

The distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time) substitute: acceleration= (final velocity-initial velocity)/time The distance = (1/2)*[(final velocity-initial velocity)/time]*(time)^2 + (initial velocity)*(time) Find time & plug b...

15 years ago

this will help you: tutorial(dot)math(dot)lamar(dot)edu/Classes/CalcI/DefnOfDerivative.aspx

15 years ago

Find acceleration: acceleration= (final velocity-initial velocity)/time Then plug into the distance formula: The distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time)

15 years ago

1. divide by molar mass of CuSO4*5H2O to convert to mole and multiply by avocado's number (6.022 × 10^23) to find how many atoms there are 2. [12(12.01)/total mass] x 100%

15 years ago

1. (10.3g CuSO4*5H2O)(1 mole /____M.M.CuSO4*5H2O)(6.022 × 10^23 atoms 6.022 × 10^23/ 1 mole) notice all the units cancel except for atoms

15 years ago

yes, the key word from the problem: "from rest"

15 years ago

opps! I overlooked the oxygen part.

15 years ago

purplemath(dot)com/modules/fcns2.htm

15 years ago

tutorial(dot)math(dot)lamar(dot)edu/Classes/CalcI/DefnOfDerivative.aspx lim h->0 ([(x+h)^2-2(x+h)]-[x^2-2x])/h

15 years ago

lim h->0 (2x + h - 2)

15 years ago

Work=(1/2)kx^2 be sure to convert cm to m by dividing 15 cm by 100

15 years ago

do you mean f(x) = 1/(x + 1)? if yes, then number 2 is correct.

15 years ago

duplicate post

15 years ago

1/y for each coordinate

15 years ago

break this problem down to horizontal (x) and vertical (y) components! it'll probably help if you drew the problem out! horizontal: (10cos20) meters 20 meters add the horizontal components together vertical: (10sin20) meters perform Pythagorean theorem- t...

15 years ago

plug in the input to solve for your output: f(0)=4(0)^2-4(0)=0

15 years ago

hint: limiting reagent chem(dot)tamu(dot)edu/class/majors/tutorialnotefiles/limiting.htm convert 114G C5H5Cl to __g DDT (or C14H9Cl5) convert 485g C2HOCl3 to __g DDT which one is smaller? that's the limiting reagent! that's how much mass of DDT is formed!

15 years ago

chemistry-dictionary(dot)com/ is a great source.

15 years ago

jiskha(dot)com/display.cgi?id=1284429441

15 years ago

to get you started: sqrt(8)=sqrt(2*2*2)=2[sqrt(2)] sqrt(18)=sqrt(2*3*3)=3[sqrt(2)]

15 years ago

1/3-(4)(4/7)+(-4)(5) try doing the rest!

15 years ago

(24e/3e)^(1/3) (8)^1/3 (2*2*2)^(1/3)=?

15 years ago

An isosceles triangle has two identical sides. therefore, it also has two equivalent angles (i.e. base angles). Know: -a triangle has three angles -the three angles total 180 degrees -if one of its base angles is 58, so is the other base angle x + 58 + 58...

15 years ago

83/x = 5/6 cross multiply: 83(6)=5x solve for x: x=[83(6)]/5 now follow my steps and do the same thing for 100!

15 years ago

do you mean... f(x) = -12x ? just plug in the input and find the output! f(-11)= -12(-11)= ?

15 years ago

what do you think?

15 years ago

great job on the first derivative! m=slope m= 6(pi/2)cos(pi/2) + 6sin(pi/2) y1=3pi x1=pi/2

15 years ago

Assuming the friend took the same math exam, then the person who scored a higher percentage on the exam scored better!

15 years ago

If they took different math exams, you'd have to factor in the their class means and standard deviations to measure who actually scored better!

15 years ago

remember to plug in your y1 and x1 & solve for y! y-y1=m(x-x1) y-3pi=6(x-pi/2)

15 years ago

what do you think? here's an example of an acid (HCl) and base (NaOH) reacting: HCl + NaOH -> H2O + NaCl

15 years ago

Is c the hypotenuse (I'm assuming)? Just perform Pythagorean theorem to find length a! a^2 + b^2 = c^2 a^2 + 1^2 = (sqrt(26))^2 solve for a.

15 years ago

if the additional fee is $125 to exhibit 5 birds, how much does it cost to exhibit 1 bird? $125/5 = ? now that you know the additional fee for each bird, find the total cost if 7 birds were exhibited $325 + (7)(?) = ___

15 years ago

combine like terms: (10x^2+5x^2)+(9x-6x)+(x^3-x^3) 15x^2 +(9x-6x)+(x^3-x^3) you can do the rest

15 years ago

for hydroxide ion, there's an additional step to find pH. after finding pOH, you'd have to plug it into the second equation and solve for pH. if you were given hydrogen ions, you could find pH in one step. pH= -log(H^+) the concentration of hydrogen ions...

15 years ago

1) the center is (1, 0), not (0, 0) notice that the major coordinates are not (0, 6) and (0,-6). 2) correct!

15 years ago

remember to convert 40.0 mL into liters (40.0 mL)(1L/1000mL) = ? Molarity (M) = moles of solute/ volume of solution in liters

15 years ago

rewrite the problem like this: -4+(-9)=?

15 years ago

acceleration= (final velocity - initial velocity)/time acceleration = .50 m/s^2 final velocity = 85 mi/h initial velocity = 45 mi/h be sure to convert mi/h to m/s!

15 years ago

jiskha(dot)com/display.cgi?id=1284407331

15 years ago

The starting point is just an reference point. It'll probably be easier to do calculations if you start at (0,0).

15 years ago

acceleration = (final velocity -initial velocity)/ time

15 years ago

if you recall the definition of a derivative is lim h->0 [f(x+h)-f(x)]/h (a) you're given: f (3 + h) - f (3) = 9h^2 + 8h just divide h so that you get f'(3) and take the lim h->0 (b) just take the slope: [f(7)-f(3)]/(7-3)

15 years ago

Molarity (M) = moles of solute/ volume of solution in liters convert 14 g of BaCl2 to moles by dividing by the molar mass! this will give you the moles of solute. once you plug every thing in and solve for volume, you would need to convert the liters into...

15 years ago

look at the units! (22g)/(__L) = 0.7893 g/ (1 mL) cross multiply and solve for volume

15 years ago

you could cross multiply. (5x+1)/(2x-3)=(10^2)/1 (5x+1)=(2x-3)(10^2)

15 years ago

yes

15 years ago

pull out the x in the numerator: x(x^2-1)/(x-1) [x(x+1)(x-1)]/(x-1) now can you reduce it further?

15 years ago

"i am a 3 digit number" 3 digit number = XYZ x=hundreds Y=tens Z=ones "divisible by 3" (X+Y+Z)/3 = whole number "my tens digit is 3 times as great as my hundreds digit" Y=3X therefore,(X+3X+Z)/3 = whole number "the sum of my digits is 15" X+Y+Z=15 or X+3X...

15 years ago

y-y1=m(x-x1)+b where m=slope and b=y-intercept (a)m=1, x1=0, y1=2 (b)since it's parallel, we know that the slopes are equal; m=2 (c)m=(y1-y2)/(x1-x2) y-y1=m(x-x1)+b (d)since x-intercept is equal to 6, we know (6, 0). since y-intercept is equal to 3, we kn...

15 years ago

do you mean? (sin3x)/3x hint: L'Hopital's Rule take the derivative of the numerator and denominator & then plug in zero

15 years ago

Force=(mass)(acceleration)

15 years ago

take the derivative of the numerator and denominator individually. then, plug in zero for x. sin3x hint: chain rule

15 years ago

see below

15 years ago

please show your work. maybe myself or the other tutors could figure out what you did wrong.

15 years ago

suppose you had: sqrt(8)+sqrt(2) if you simplify it: 2(2sqrt(2))+sqrt(2) what would you be able to do? 4sqrt(2)+sqrt(2) = 5sqrt(2)

15 years ago

µ = f / N, where µ is the coefficient of friction, f is the amount of force that resists motion, and N is the normal force f=µN ma=µmg cancel m on both side: a=µg http://ffden-2.phys.uaf.edu/211_fall2002.web.dir/ben_townsend/staticandkineticfriction.htm

15 years ago

it will help you if you drew the line out! A----B-------C AB + BC = AC solve for AB.

15 years ago

4(3z^3) + 4(-6)+12(2) + 12(-z^3) now simplify it further and combine like terms!

15 years ago

http://www.chemistry-dictionary.com/definition/isotopes.php

15 years ago

9(A+4)

15 years ago

yes.

15 years ago

yes.

15 years ago

yes.

15 years ago

yes.

15 years ago

that's incorrect. -2+(-8)=? AnOnYmOuS1, PLEASE DO NOT POST MULTIPLE THREADS! Instead, post one thread containing all the answers you want to be checked

15 years ago

yes.

15 years ago

yes.

15 years ago

yes.

15 years ago

try two significant figures.

15 years ago

You are correct Not putting it.

15 years ago

1 Megameter = 10^6 meters 1 meter = 100 cm I'll convert megameters to meters for you. (41.2 megameters/hr)(10^6 meters/1 megameter)(100 cm/ 1 meter)=___m/hr notice how all the units cancel to m/hr now that you have m/hr, please convert hr to sec, knowing...

15 years ago

2/1 =? 6/2=? 24/6=? 120/24=? see the pattern?

15 years ago

http://www.algebra.com/algebra/homework/Distributive-associative-commutative-properties/change-this-name23395.lesson

15 years ago

http://www.algebra.com/algebra/homework/Distributive-associative-commutative-properties/change-this-name23395.lesson

15 years ago

(2n+7n)+(5-8)=15 combine like terms and solve for n!

15 years ago

http://www.jiskha.com/display.cgi?id=1284585197

15 years ago

E=m*c*(T2-T1)

15 years ago

acceleration= (final velocity - initial velocity)/time find time.

15 years ago

The distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time) distance= 2m find acceleration.

15 years ago

http://www.helpalgebra.com/onlinebook/substitutionmethod.htm

15 years ago

http://www.algebralab.org/lessons/lesson.aspx?file=geometry_coordparallelperpendicular.xml

15 years ago

v = (1/3)(π)(r^2)h 30pi cm^3=(1/3)(π)(3^2)h find h.

15 years ago

http://www.jiskha.com/display.cgi?id=1284449348

15 years ago

(20)(40)=(x+20)(30) solve for x

15 years ago

(a) acceleration=(final velocity-initial velocity)/time distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time) (b) 100m - _____ (<-answer from (a)) find time using this formula: distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(...

15 years ago

note: for part (b) plug in the "new" distance

15 years ago

If I combined salt and pepper, they form a _______?

15 years ago

http://www.mathsisfun.com/mean.html

15 years ago

a^2+b^2=c^2 x^2+(2x-10)^2=25^2

15 years ago

1/2 + 2/14 = x/150

15 years ago

http://www.purplemath.com/modules/workprob4.htm

15 years ago

2/1+14/2=150/x

15 years ago