# Pre-cal

6,430 results

### pre cal

does anyone take pre-cal online ?

### 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

### 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-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 =)

### 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

### 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

ix^2-2x+i=0

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.

tan-1=43\9.3

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)

### 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.?

### 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]

cos^2+tan^2=1

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

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

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.

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?

### 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)

### Pre-Cal

Find the distance from point (-1, 3) to the line 5x- 4y= 10.

### Pre-Cal

Find the domain of the function. sqrt of x^2-9

### pre-cal

find the intercepts. y=2x-2 show work

### Pre-Cal.

find all the zeros of f(x)=x3-3x2+4x-12

### Pre-Cal

convert è = -2 to rectangular equation form

### pre cal

f(x)=2x^2+12x-6 what is the min or max value ?

### pre cal

Sin3x=3cos^2xsinx-sin^3x

### pre cal

Choose the point on the terminal side of -45°

### pre cal

what are the real and imaginary zeros of the equation 2x^3 + 5x^2 - 3x + 7