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algebra
Can someone please check my work on this problem? For some reason, I get the feeling that I did it wrong. sqrt=square root (by the way) 3sqrt10 sqrt5+sqrt2  *  sqrt5sqrt2 sqrt5+sqrt2 (3sqrt10)(sqrt5+sqrt2) =
asked by Whitney on March 3, 2007 
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I have to find an exact solutions on the interval [0,pi) for both of these problems 1) 2sin2x = sqrtx and 2) 12sqrt2 sinxcosx = 0 I know this much: 1) sin2x = (sqrt x)/2 = 2sinxcosx = (sqrt x)/2 What do I need to do next? 2)
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Algebra II (check)
Assume that no denominator equals 0. sqrt12  sqrt18 + 3sqrt50 + sqrt75 = (sqrt2^2*3)  (sqrt2*3^2) + (3sqrt2*5^2) + (sqrt3*5^2) = (sqrt2^2*sqrt3)  (sqrt3^2*sqrt2) + (3sqrt5^2*sqrt2) + (sqrt5^2*sqrt3) = (2*sqrt3)  (3*sqrt2) +
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1)Find the standard deviation of the data set to the nearest tenth. (21,13,18,16,13,35,12,8,15) A)16.8 B)7.8 C)7.3 D)5.7 I chose C mean = 21+13+18+16+13+35+12+8+15/9 16.8 variance = (2116.8)^2 = 17.64...did that with the rest and
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Precalculus
Given: f(x) = X^2x evaluate: f(sqrt2 + 3) I have worked out this and am stuck: (sqrt2+3)^2  (sqrt2+3) (sqrt2+3)*(sqrt2+3) (sqrt2 +3) (sqrt2)^2+ 3sqrt2 +3sqrt2+ 9 (sqrt2+3) 2+6sqrt2 +9sqrt23 and am stuck or wrong here. Ans=
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precalc
Can someone check my work please? Convert each polar equation to a rectangular equation. Then determine the graph's slope and yintercept. ( I'm going to type 'x' instead of theta ) r sin(x pi/4)=2 r(sin(x pi/4))=2 r(sinx*cos
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Algebra
1)A bookshelf holds 4 mysteries, 3 biograpghies, 1 book of poetry, and 2 reference books. If a book is selected at random from the shelf, find the probability that the book selected is a biography or reference book. A)1/2 B)1/6
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Calculus length of curve
Hican anybody show me how to do this? Find the length of the curve r(t)= (sqrt2)i + (sqrt2)j + (1t^2)k from (0,0,1) to (sqrt2, sqrt2, 0). Thank you!!!!!!!
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maths  a few questions
Simplify 3(x2)^2/x2 Is the answer 3x^210x+10? If not then what is? When p= sqrt2 and q= sqrt6 write pq in the form a(sqrt)b where a and b are integers and b is as small as possible. Multiply out these brackets. Give your answer
asked by em on February 24, 2007 
Algebra 2
I have tried solving this problem over and over but I'm still not sure with my answer. The question is sqrt2 / 2 + sqrt2. I think the answer is 1/sqrt2 + sqrt2 because you have to cancel out the common factors.
asked by Tommy on May 20, 2015