pre cal--check

22,565 results

pre cal

does anyone take pre-cal online ?

Science -- Check my Answer Plz

How much heat (calories) must be applied to a 100 mL beaker filled with boiling water in order to vaporize the water? ** A) 540 cal ** B) 540 * 10^4 cal C) 800 cal D) 8000 cal Is A correct? or cud it be B.?

Integrated Physics and Chemistry

The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temperature from 20°C to 21°C? A)0.009 cal B)0.09 cal C)0.9 cal D)9 cal

Pre-Cal(Please check)

sqrt2 /10 Do I just leave this as sqrt2/10 or can I reduce it to sqrt1/5?

pre cal--check

Name all the values of x that are not in the domain of f(x) = (2–x^2)/ (x+ 5) I got only x= -5 because that's the only value that would make the denominator zero.

Pre Cal Check

focus: (0,p) vertex: if not given, then it is assumed (0,0) Directrix: k+p or k-p, i'm not sure I think these are the general equations for the focus, vertex, and directrix of a parabola, but i'm not sure. could someone please check this? thanks.

Pre-Cal(Please check!!!)

solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.

math

80 cal/g x 5 g 400g/cal or 400 cal/g not sure can any one help Neither. 80 cal/g x 5g = 400 cal. The unit g cancels to leave calories. x2+2x-15

Chemistry/Physics

How much heat is required to raise the temperature of 100 g of lead 20 degrees C? The specific heat of lead is 0.0305 cal/g K. A) 51 cal B) 61 cal C) 71 cal D) 81 cal

Pre-Cal(Please check)

1)f(x) = -x + sqrt 4 - x^2 Find f(-2) -(-2) + sqrt 4 - (-2)^2 = 2 + sqrt 4 + 4 2 + sqrt 8 = 4.828 Is this correct?

Physics

A 150 gram golden (specific heat 0.03 cal/gram^0 C) spoon at 20^0C is placed in a cup of tea at 100^0C. The amount of heat which the spoon absorbs from the tea which is necessary to reach spoon's tempature 47^0C is a)360.4 Cal b)121.5 Cal c)78.24 Cal d)15.08 Cal e)157.5 Cal

Pre-Calculus

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)

Pre-Calculus

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)

Pre-Cal(please check)

I have to find the width of a river which is represented by a right trianle. The opposite side is labeled w and the adjacent side is 1oo ft. Theta is 54 degrees. Would my equation be opp = adjacent/cos(54)?

Science

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...

physics

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...

Chemistry

How much heat is released when 10 g of steam at 100°C is cooled to 10 g of liquid water at 100°C? I am working on a practice test and the answer is not in the back of the book. Can some one help me. 1. 10 cal 2. 5400 cal 3. 800 cal 4. 6200 cal

chemistry

How many calories are required to heat 25.0 g of platinum from 24.5 °C to 75°C (specific heat of platinum = 0.139 J/gK)? 1. 47 cal 2. 42 cal 3. 48 cal 4. 20 cal 5. 80 cal Thank you.

Pre-Cal

xy=2 {{x^2=3+y^2}}

Pre Cal

1 --------- 2x^2-2 --------------- 2 + x ---- ------- x+11 x^2-2x-3

pre cal

3(2x-1)^2 (2) (x+3)^1/2 + (2x-1)^3 (1/2) (x+3)^-1/2

Pre cal

ix^2-2x+i=0

Pre Cal

x 2 + y 2 = 0

pre cal

x^2+bx+ ?=(x+ ? )^2.

pre cal

(x/x-1)-(x/x+1) -2=0

pre cal

1/(x-1)- x/(x+1)-2=0

Physics

A substance has the following properties; Boiling Point = 140 °C, Freezing Point = -10 °C, specific heat as a gas, liquid and solid, 0.3 cal/g.C°, 1.8 cal/g.C° and 0.8 cal/g.C° respectively. Heat of fusion =100 cal/g and heat of vaporization = 480 cal/g. How much heat ...

pre - cal

12-5y^2 what's the question?

Pre-Cal

What are bearings??

pre cal

what is the sum of e or 1n

Pre Cal

Solve for x 2^x=8^x-3

pre cal

solve for x 8x-(2x-1)=3x-10

Pre Cal

What is the inverse of g(x)= 1/2(x-1)^3-4

pre cal

(y^2)^-4y^8 simplify

Pre-Cal.

How does this go from x^2+ to 2i, explain.

Pre-Cal

tan-1=43\9.3

Pre-Cal

2y=cos(4(t-6))+6

pre cal

f(x) = 3x + 5, g(x) = 6x^2 Find (fg)(x)

Pre cal

sin55=12/b what is b

Chemistry

Which of the following is the correct unit for specific heat? degree C*** Cal cal/g cal/(g*deg C)

pre-cal

find the value(s) of x for which f(x)=g(x). f(x)=x^4-2x^2,g(x)=2x^2

Pre-Cal (again)

If: f(x)= 3/x^2-1 g(x)= x+1 What is the domain of f, g, and f o g?

pre cal

What would cos2theta=-1/2 be???

Pre-Cal

Find f X g 3 sqrt of x+1 X x^3+1

Pre-Cal

Simplify e^3ln2-1

pre-cal

(576^1/2+512^1/3)^1/3

pre-cal

tan((theta/2)+(pi/6))=-1

Pre Cal

simplify the quotient: [x(5x+1)-3(x^2+1)]/ [(x-1)^2]

Pre Cal

cos^2+tan^2=1

Pre Cal

cos 75 deg

pre cal

7tan^2(pheta)-2=3

pre-cal

f(x)=((6xy^3)^1/2)((30x^4y^6)^1/2)/(5x^-7y^4)^1/2

Pre Cal

f(x) = log3(93 x + 3 815 x + 3)

pre-cal

find the intercepts of y=2x-4

Pre-Cal.

f(x)=x^3-3x^2+x-12 =x^2(x-3)+4(x-3) =x^2+4) (x-3) so if f(x) = 0 at x = 3,+/- 2i. what is the f(x) factored form

pre cal

quadratic equation 2x^4-5x^2+2=0

Pre-Cal

What is the domain of f/g, given f(x)= x+2 and g(x)= x-7?

Pre cal

-3x^4+27x^2+1200=0

PRE-CAL

SIMPLIFY 55/SQUARE ROOT OF 20 -3

pre cal

solve for x: x^(2/3)=(1/27) (2^(x)+4)/(2^x)=2 explain please

Pre-Cal.

Describe the end behavior of f(x)=2x^4-5x+1: A. x-->‡, f(x)-->‡; x-->-‡, f(x)-->-‡ B. x-->‡, f(x)-->‡; x-->-‡, f(x)-->‡ C. x-->‡, f(x)-->-‡; x-->-‡, f(x)-->‡ D. x-->‡, f(x)-->-‡; ...

Pre-Cal

solve(5-x)^-3=8 teach if possibe if not, its ok Thanks

Pre-Cal

Find the inverse of the function f(x) = 3^x+2

Pre-Cal

Identify any asymptotes of the graph. y = 1.08^5x

Pre-Cal

What is the domain of f/g? f(x) = x / x+1 g(x) = x^3 Please explain! Thank you

Pre-Cal

what about the domain of 1/x. Would it be 0?

pre-cal

solve this system of equation 3x-y+5z-2w=-44 x+6y+4z-w=1 5x-y+z+3w=-15 4y-z-8w=58

Pre-Cal

Find the domain for the function f(x)=-2x^(2)÷-x^(2)-6x-27

pre-cal

what is the vertex and directrix of the parabola y=-1/2x^2 + 10 - 46

pre cal

[root2(cos2pi/11+isin2pi/11)]^4

Pre Cal

the function y= tan (x/3) has an x intercept at?

pre cal 2

solve the equation 4cos^2x-1=0

Pre Cal

simplify the quotient: [(x+1)^3(4x-9)-(16x+9)(x+1)^2]/[(x-6)(x+1)^3]

pre-cal

Find B so that F(x)=-x^2+bx-75 has a maximum value of 25.

Pre-Cal

find the value of the function k(p/q)

Pre-cal

Does the equation x^2+x-12/x+2 have holes?

Pre-cal

10.2 can someone show me this graph(x+2)^2/4+(y+2)^2/15=1

Pre cal

Sec^2x=2 With 10 different answers

pre-cal

solve the equation algebraically. 7e^x=11-e^-x

pre-cal

Find the real zeros of f (x)= 2x^3 + 2x^3 – 8x + 3

pre-cal

Find the real zeros of f (x)= 2x^3 + 3x^2 – 8x + 3

pre-cal

find the distance d (P1 P2) between the P1 and P2 P1=(-1,1);P2=(1,2)

Pre Cal

What is the phase shift of F(x) = 3 sin (2x - 2)?

Pre-cal

f(x)= x+1 and g(x)= square root of x-3 please help me!

Pre-Cal.

write f(x) in factored form.

pre cal

Solve G(x) for the given domain. G(x) = 3x 2 - 2x - 1 G(6) =

pre cal

Find the inverse of the function. f(x) = x3 + 8

Simple pre cal

Is the relation a function? {(14, 9), (15, 8), (8, 7), (1, 9), (15, 2)}

Pre-cal

What is the area of triangle ABC if a = 19, b = 14, and c = 23?

Math (Pre cal)

Can someone show me how to do this? let f(x)=x^2+3x-1 and g(x)=x^3+4x^2+1

pre-cal

How do you work inverse functions alebraically?

Pre-Cal

FIND A POWER WHOSE SUM IS: (a) 5 / (1-3x) (b) 9 / (1-4x) (c) 6 / (2-4x)

pre-cal

what are the steps to solve sec y sin (pi/2-y)=1

Pre-Cal

how do we put x^2-2y^2=4 into a standard equation???

Pre cal

Find the area of a triangle with sides of 12, 14 and 20

pre cal

convert the point to polar coordinates: (12,-12)

pre cal

convert the point to rectangular coordinates (7,1.75)

Pre Cal

simplify the expression 2sin^2 t + cos^2 t-2

pre cal

please help don't understand this...Assume f(x) = 2x + 8 and g(x) = 5. What is the value of (f + g)(3)?

Pre-Cal

Find the distance d(P1,P2) between the points P1 and P2. P1= (-2,1); P2= (0,0) P1= (-1,1); P2= (2,2) P1= (-1,0); P2= (2,4) P1= (2,-3); P2= (4,2)

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