Algebra
Solving equations simultaneously: .7*x+.30*y=33.1 (x*y)/(.7*y+.30*x) = 3.66 I get stuck after I get 51.972=45.2y-.42y^2 I know the answers are supposed to be x=2.6 and y=104
Algebra
Solving equations simultaneously: .7*x+.30*y=33.1 (x*y)/(.7*y+.30*x) = 3.66 I get stuck after I get 51.972=45.2y-.42y^2 I know the answers are supposed to be x=2.6 and y=104
Trig
Verify that each trigometric equation is an identity. 1/1-sinx + 1/1+sinx = 2 sec^2x
Chemistry
Find the pH: 1) A 0.001M solution of HCl 2) A 7.98 x 10^-2 M solution of HNO3 3) 1098L of a solution containing 8.543moles of HBr 4) 120mL of a solution containing 0.005 grams of hydrochloric acid. Please help me with these four. Out of 20 questions i only didn't understan...
Trig
A pulley with a diameter of 24 inches is driven by a belt which is moving 1045 ft/min. How many revolutions per minute are made by the pulley?
Trigonometry
A car wheel has a 13-inch radius. Through what angle does the wheel turn when the car rolls forward 4 ft?
Trigonometry
A bicycle with a 26-inch wheel(diameter) travels a distance of 700 feet. How many revolutions does the wheel make?
Trigonometry
A pendulum of length 17.6 inches swing 1 degree and 5 minutes to each side of its vertical posisition. To the nearest hundreth of an inch, what is the length of the arc through which the end of the pendulum swings?
Trigonometry
Two wheels are rotating in such a way that the rotation of the smaller wheel causes the larger wheel to rotate. The radius of the smaller wheel is 4.4 centimeters and the radius of the larger wheel is 20.9 centimeters. Through how many degrees wil the larger wheel rotate if th...
math
A sensor light can detect motion for a distance of 70ft. with a range of motion of 189 degrees. Over what area will the sensor detect motion and become illuminated?
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