(x+y)^2 + 3(x-y)=30; xy + 3(x-y)=11 what are the values of x and y ?

(x+y)^2 + 3(x-y)=30; xy + 3(x-y)=11 what are the values of x and y ?

Forensic scientists use the equation h=2.6f+47.2 to estimate the height h of woman given the length in centimeters f of her femur bone. suppose the equation has a margin of error of...

Find intervals containing solutions to the following equations. (a) f(x) = x − 3^−x = 0 b)f(x) = x^3 + 4.001x^2 + 4.002^x + 1.101 = 0. I want help how can I find...

Please help. This is on my review packet and I don't quite understand it.

Please help. This is on my review packet and I don't quite understand it.

Please help. This is on my review packet and I don't quite understand it.

For what integral values of ‘a’ , the equation x2-x(1-a) – (a+2) = 0 has integral roots. Find the roots. Plzz hellp me solving this

Write the quadratic equation whose roots are −6 and −3, and whose leading coefficient is 3

Mark cycles from home to school at a speed of 16 km per hr. He cycles back in the same route at a speed of 15 km per hr. The total time taken for the journey is 7 3/4.given the distance from his home...

If an archer shoots an arrow straight upward with an initial velocity of 128 ft/sec from a height of 6 ft, then its height above the ground in feet at time t in seconds is given by the function h(t)=-16t^2+128t+6...

2x-y=5 -2x-5y=11

Write the point-slope form of the equation of the line described. Through:(-5,-2), parallel to y=x+1

Find the point slooe form of the equation of the line.

The paddle wheel of a ship is 11 feet in diameter, revolves 15 times a minute when moving at top speed, and is 2 feet below the water's surface at its lowest point. Using this speed and starting from...

I really need to know how because I am so confused on how to do it. PLEASE I NEED TO KNOW

At a gourmet nut shop, nuts are sold in bulk. Cashews sell for $1.30 per pound and macadamia nuts sell for $8.45 per pound. Lee wishes to purchase 5 pounds of mixed nuts by mixing 3.5 pounds of cashews...

According to a study, each week the average elementary child spends 17 hours watching television, 2 hours reading books, and 10 hours playing outside. What is the ratio of number of hours...

Kikis brother is 15 years older than she is. Together they have a total of 43 years. How old is her brother?!

Solve the system. State whether the system is inconsistent or has infinitely many solutions. If the system has infinitely many solutions, write the solution set with y arbitrary. 4...

Solve the system with three unknowns x+y+z=-8 2x+y-z=2 x-y+z=4 Is this an empty set, does it have one solution, or many solutions? Solve this system...

Solve the system analytically 2x-5y+5z=13 5x-4y-2z=-36 x-y+4z=35 The solution set is {(_,_,_)} Solve this system 3x+3y+z=0 x-3y+2z=-21 8x-2y+3z=-41 The...