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noelle
Questions (8)
21/4 divided by -10/4
1 answer
185 views
. 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.
3 answers
419 views
For which pair of integers (l, w) , representing the length and width of a rectangle , is the numerical value of the area equal
1 answer
260 views
Jennifer travels from Boston , Massachusetts, to Fairfield, Connecticut, a distance of 90 miles, at a speed of 45 miles per
3 answers
827 views
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,
1 answer
258 views
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
1 answer
287 views
if (x + 3)(x -2) = 1
show that x^2 + x -7 = 0
3 answers
317 views
System of equations, the addition method
3x-3y=6 3x+3y=0 Whats the answer?
1 answer
475 views
Answers (3)
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
if what you say about their approaching rate is true, jim ran 8 * 5/18 = 20/9 miles
thanks
