Homework Help

Math

Core 4 maths question, please help!find the coordinates of the point of intersectino of the tangents to y=sin x...

Posted by littlecrumpet on September 13, 2011 at 5:42 AM via web. 1 educator answer.

Math

what is solution of equation arrangements(x+1,2)=combinations(x-1,2)+12?

Posted by helga95 on September 13, 2011 at 1:59 AM via web. Be the first to answer.

Math

The sum of a surface area of a sphere and a cube is given. Show that when the sum of their volumes is least, the...

Posted by dhatri on September 13, 2011 at 1:59 AM via web. 1 educator answer.

Math

How do you simplify a number?

Posted by ilovlola21162 on September 13, 2011 at 1:54 AM via web. 1 educator answer.

Math

What is tan (x+pi)?

Posted by helga95 on September 13, 2011 at 1:44 AM via web. Be the first to answer.

Math

What is the domain of the function f(x)=1/square rootx-3?

Posted by helga95 on September 13, 2011 at 1:41 AM via web. Be the first to answer.

Math

What are all solutions of exponential equation 3^(x-1)+3^x=36?

Posted by helga95 on September 13, 2011 at 1:40 AM via web. 1 educator answer.

Math

What is the natural number n>=1 given A(n,1)+C(n,1)=10? A is arrangements and C is combinations

Posted by helga95 on September 13, 2011 at 1:32 AM via web. Be the first to answer.

Math

What is the area of rectangle that has the length of 50 units and the perimeter of 180 units?

Posted by agleh on September 13, 2011 at 1:16 AM via web. Be the first to answer.

Math

Show that the polynomial x^3-3x+2>0 if x>1.

Posted by buterflight on September 13, 2011 at 1:03 AM via web. Be the first to answer.

Math

What is the range of the function f(x)=-4x+3 if the domain is [0,2]?

Posted by buterflight on September 13, 2011 at 12:58 AM via web. Be the first to answer.

Math

What is the solution of equation 2^(x-1) -12 = -2^x?

Posted by buterflight on September 13, 2011 at 12:30 AM via web. Be the first to answer.

Math

Find the point of intersection of the lines y=3x-1 and y=1-3x?

Posted by buterflight on September 13, 2011 at 12:27 AM via web. Be the first to answer.

Math

Solve the equation 2^x - 14*2^-x=-5?show the steps

Posted by buterflight on September 13, 2011 at 12:26 AM via web. 1 educator answer.

Math

Show how to prove that (cosa+i*sina)(cosa-i*sina) is real?

Posted by helga1995 on September 12, 2011 at 11:12 PM via web. Be the first to answer.

Math

(2,3), (3,-2) and (8,k). find k

Posted by studius on September 12, 2011 at 10:47 PM via web. Be the first to answer.

Math

What is  the complex number (2-i)/(1-i)?

Posted by helga1995 on September 12, 2011 at 10:39 PM via web. Be the first to answer.

Math

i need to solve this : -3^x +4^x +5^x <6^x

Posted by robertdaniel94 on September 12, 2011 at 10:03 PM via web. Be the first to answer.

Math

find the least no which when divided by 17, 16 ,15 leaves the remainder 3, 10, 0 respectively u have to explain...

Posted by keshavkr on September 12, 2011 at 7:23 PM via web. 1 educator answer.

Math

IS HIGHER ALGEBRA BY HALL & KNIGHT A GOOD FOR IIT FOUNDATION ??

Posted by pankajgarg9696 on September 12, 2011 at 6:17 PM via web. Be the first to answer.

Math

Find all points having an x-coordinate of 3 whose distance from the point (-2,-1) is 13. Use the Pythagorean...

Posted by jaredpitts on September 12, 2011 at 12:34 PM via web. 1 educator answer.

Math

If in triangle ABC angle A and B are exactly the same, but angle C is half as large as angle A, how much is each...

Posted by s12345678 on September 12, 2011 at 7:45 AM via web. 2 educator answers.

Math

"let g : x -->2^xprove that g(a) * g(b) = g(a+b)"

Posted by jgwirki on September 12, 2011 at 7:42 AM via web. 1 educator answer.

Math

Solve the set of equations: x+y+z=118 70x+30y+0z=5060

Posted by svjr on September 12, 2011 at 4:00 AM via web. 1 educator answer.

Math

Calculate the product f(0)*f(1)*...*f(2011) if f(x)=6x^2-5x-1.

Posted by helga1995 on September 12, 2011 at 2:05 AM via web. Be the first to answer.

Math

How to find the real solutions of the equation square root(2x+8)=x?

Posted by helga1995 on September 12, 2011 at 1:58 AM via web. 1 educator answer.

Math

What is x if 3^x + 3^(x+1) - 2*3^(x+2) = -14?

Posted by helga1995 on September 12, 2011 at 1:52 AM via web. Be the first to answer.

Math

In the expansion of (1+x)^n the coefficient of x^9 is the arithmetic mean of the coefficient of x^8 and x^10....

Posted by vardhman1996 on September 12, 2011 at 1:13 AM via web. 1 educator answer.

Math

Find the inverse of the function f(x)=squareroot(x+7) if x>=-7?

Posted by helga95 on September 12, 2011 at 12:54 AM via web. Be the first to answer.

Math

Given the terms of a arithmetic sequence a,b,c, verify if 3(a^2+b^2+c^2)=6(a-b)^2+(a+b+c)^2?

Posted by helga95 on September 12, 2011 at 12:29 AM via web. Be the first to answer.

Math

Prove that the expression (sin2x-cos2x)^2+(cos2x+sin2x)^2 does not depend on x.

Posted by helga95 on September 12, 2011 at 12:21 AM via web. Be the first to answer.

Math

Calculate 5cosa+13cosb if sina=3/5 and sinb=12/13?

Posted by tarja19 on September 12, 2011 at 12:07 AM via web. Be the first to answer.

Math

If the graph y=x^3-4x^2+x+6 is stretched horizontally by a factor of 2 about the line x=4, what is the resulting...

Posted by math30fail on September 12, 2011 at 12:06 AM via web. 1 educator answer.

Math

Find the solution of the logarithmic and exponential equation log(4)(2^(x+1)-1)=0?

Posted by helga95 on September 11, 2011 at 11:56 PM via web. 1 educator answer.

Math

What is derivative of the function y=lnx/(2x-sinx)?

Posted by helga95 on September 11, 2011 at 11:34 PM via web. Be the first to answer.

Math

What is the antiderivative of the function (g(x)-2)^2 if g(x)=x+e^x+2?

Posted by buterflight on September 11, 2011 at 11:30 PM via web. 1 educator answer.

Math

Given f(x)=(x+1)^3-(x-1)^3, what is derivative f'(x)?

Posted by buterflight on September 11, 2011 at 11:18 PM via web. 1 educator answer.

Math

prove that dy/dx<0 if x is a real number. y=x+1/x-2

Posted by buterflight on September 11, 2011 at 11:10 PM via web. Be the first to answer.

Math

Calculate the limit of the function (x^2-4)*f(x), if x goes to 2. f(x)=x+1/x-2

Posted by buterflight on September 11, 2011 at 10:44 PM via web. Be the first to answer.

Math

Find the vertex of parabola given by f(x)=x^2-4x+3?

Posted by buterflight on September 11, 2011 at 10:24 PM via web. Be the first to answer.

Math

The selling price of an article is 7/5 times that of the cost price. The gain % is  

Posted by sathar on September 11, 2011 at 10:09 PM via web. 1 educator answer.

Math

What are real solutions of exponential equation 4^(3x-2)=2^(x^2+1)?  

Posted by agleh on September 11, 2011 at 9:32 PM via web. Be the first to answer.

Math

Solve for x the equation log(4)(x^2-6x+11)=1?

Posted by agleh on September 11, 2011 at 9:26 PM via web. Be the first to answer.

Math

Find all real solutions to the logarithmic equation ln (x) + ln (2) = 0?

Posted by agleh on September 11, 2011 at 9:20 PM via web. 1 educator answer.

Math

What is the real solution of exponential equation 13^(3x^2+5x-3)-13^(-1)=0?

Posted by agleh on September 11, 2011 at 9:12 PM via web. Be the first to answer.

Math

Line d1 has a slope of -1/4. Line d2 is perpendicular to line d1. Find the slope of line d2? If d2 is parallel...

Posted by greypeach on September 11, 2011 at 8:57 PM via web. Be the first to answer.

Math

What is cot x if sin x=1/5 and angle x is larger than 90 degrees?x<180 degrees

Posted by pengui on September 11, 2011 at 8:43 PM via web. Be the first to answer.

Math

Find all real solutions to th exponential equation e^3x=-1?

Posted by agleh on September 11, 2011 at 8:31 PM via web. Be the first to answer.

Math

sqr(x+5-4sqr(x+1))+sqr(x+2-2sqr(x+1))=1x=?

Posted by guden on September 11, 2011 at 7:39 PM via web. Be the first to answer.

Math

Find all values of x that satisfy: 2x^3-x^2-8x+4>=0.    I put ^ to tell you that it represents power and...

Posted by jenny321 on September 11, 2011 at 5:13 PM via web. 1 educator answer.