# Math (Pre Cal)

139,263 results

**pre cal**

does anyone take pre-cal online ?

**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

**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

**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

**Math (Pre-Cal)**

The infinite series S = 1/5 + 3/5^3 + 5/5^5 + 7/5^7 + 9/5^9 + ... converges. Find S.

**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

**Math pre cal**

prove the following identity cos^4X - sin^4X = 1-2sin^2X

**Math applied/pre-cal**

(-8/5)^7/4*(-8/5)^1/4=64/25 Not sure how get this answer . Could please show me the steps.

**Math/Pre Cal**

Find the sum of the geometric series 128-64+32-______to 8 terms .

**Math/Pre Cal**

Find the sum of the geometric series 128-64+32-______to 8 terms .

**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

**Math Pre Cal**

Find the values of the trigonometric functions of è from the information given. cot è = 1/2 , sin è < 0

**Math (College Pre-Cal)**

Find a formula for(f o g)(x)assuming that f(x)= e^(4-7x)and g(x)= ln(x). Give your answer in the simplest form.

**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.

**Math (College Pre-Cal)**

For given functions f and g find formulas for a)f o g and b)g o f. Simplify results as much as possible. f(x)= x+7/x-13 , g(x)= 1/x+1

**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)

**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]

**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

**math**

if a person weighing 150 pounds runs in place for 15 minutes and the reg cal burned is 650 cal /hr Since 15 minutes is 1/4 of an hour, multiply 650 by 1/4. 162.5 cal/hr

**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**

What is the future, rounded to whole dollars, of $25,000 after 7 1/2 years, if money earns at an annual rate of 5.75% compounded continuosly?

**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)?