noelle

System of equations, the addition method 3x-3y=6 3x+3y=0 Whats the answer?

if (x + 3)(x -2) = 1 show that x^2 + x -7 = 0

Which choice is the smallest value? Option 1: 1/0.1 Option 2: (0.1)^2 Option 3: sqrt0.01 Option 4: 0.1/1 Option 5: 0.1

If 1 ounce of silver costs $5.50, how much money is needed to buy 2 1/2 pounds of silver? 16 oz = 1 pound $88, $176, $200, $220, $240

Jennifer travels from Boston , Massachusetts, to Fairfield, Connecticut, a distance of 90 miles, at a speed of 45 miles per hour, and returns at a speed of 60 miles per hour. To the nearest half mile per hour, what is Jennifer's average rate for the whole...

For which pair of integers (l, w) , representing the length and width of a rectangle , is the numerical value of the area equal to the numerical value of the perimeter ? (2,3) (3,3) (3,4) (3,6) (4,6)

. A circle has a circumference of C inches and an area of A square inches. If C = 2/5 * A what is the diameter of the circle? A. 0.4 inches B. 0.8 inches C. 2.5 inches D. 10 inches

21/4 divided by -10/4

thanks

if what you say about their approaching rate is true, jim ran 8 * 5/18 = 20/9 miles

sorry for being 13 years late, but the way that Reiny went from cosx(2sin^2x-1)/sinx ---> (cosx/sinx)(-cos2x) was by flipping the sign of the Pythagorean Identity: cos2x=1-2sin^2x. flipping the equation around, we can see that cos2x ---> -cos2x 1-2sin^2x...