Simplify the following expressions

(1.) (1-√7)(1+√7)=     (2.) √3(2√3+√6)=

05/03/15

how to solve this

a/2=b/3=c/5 then a+b+c =?                                c

05/02/15

sets problem

if A and B are two sets containing 3 and 6 elements, what can be minimum and maximum number of elements in AUB(A Union B)?

8/x-9 interval notation

determine the domain of the rational function. answer using interval notation  

05/02/15

Gardeners Algebra Question

Two gardeners are comparing their charges. One charges $20 initially, and then $15 per hour. The other charges $17 per hour. What would be the time involved for a job for which they both charge the... more

Express in simplest form. Assume that x > 0. Thanks :)

√x(√x^5 - √4x)

what is 12 a^2 = 75 simplified

12 a^2 = 75 

The base of a triangle is 2.1m longer than its height. If the triangles area is 9.35 m^2, what are the bad rand height of the triangle, in feet?

It is a triangle, I need help with it. It is for college. I do not get it.

04/30/15

figuring power

A cyclist does 4.5*10^5 J of work peddling to the top of a ridge. She completes the climb in 75s How much power has she expended during her ride

04/30/15

Fuctions question

d(t)=I.2t^2. The function d, defined above, models the distance in feet that a ball rolls down an inclined ramp in t seconds. According to this model, how many seconds would it take the ball to... more

04/30/15

translating using numbers and symbols

Five plus six divided by the product of two times x

determining the qualities of sets

Let U= {q,r,s,t,u,v,w,x,y,z}      A={q,s,u,w,y}      B= {q,s,y,z}      C= {v,w,x,y,z}   Determine the following   1) A∩B'   2) (A υ B)'

04/29/15

The hypotenuse of a right triangle is 17 cm and the longer leg is 7 cm greater than the shorter leg. Find the area of the triangle

This is from a math quiz in Algebra 1. I didn't understand the problem

04/29/15

two men have $560 between them. If one man has six times as much money as the other, how much has each man?

i have a whole bunch of questions like these and i have NO idea how to solve them

Am I doing this function question correctly?

f(x) = x+4 / x^2 + x - 56   Find all values of x that are not in the domain of f. If there is more than one value, separate them with commas.   I factored the quadratic into (x - 7) ( x +... more

04/28/15

What is the ratio of 125 to 125/8?

not sure how to solve ratio problems, where do I start?

04/28/15

if y varies directly as x and y=11 when x=4 find the equation of the variation?

If y varies directly as x and y=11 when x=4, find the equation of the variation

math questions financial

Determine the effective annual yield to the nearest tenth of a percent for each Investment.  Then select the best Investment.    A. 5% compounded monthly    B.  5.1 % compounded quaterly   

math questions

The price of a house is $140,000. The bank requires a 20 % down payment for a 25 year mortage at 6 %    A. Find the monthly payment    B. Find the monthly cost of interest   

04/28/15

The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, What is the the speed of the first train? A.85 km/hr B. 87.5

The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, What is the the speed of the first train?   A. 85 km/hr   B. 87.5 km/hr   C. 90 km/hr   D.... more

math questions

If i have 12 dogs 15 cats and 6 people how many legs are there between the people and the dogs

04/28/15

Prove the identities sinx/1 + cosx =1-cosx/sinx

Please help

04/27/15

7^x=49^217

do you solve by factoring help

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