Answer:
Using the quadratic formula:
x = [-4 +- sqr root (16 - 4 * 1 * -1)] / 2 *1
x = [-4 +- sqr root (20)] / 2
x1 = [-4 + sqr root (20)] / 2
x2 = [-4 - sqr root (20)] / 2
x1 = 0.23607
x2 = -4.2361
Step-by-step explanation:
Note that this is a right triangle, and that the length of the hypotenuse (17) is given, as is one of the acute angles (30 degrees). We need to determine the length of the "adjacent side," that is, the side of the triangle adjacent to the 30 degree angle. Which of the 6 trig functions relates the 30 degree angle, the length of the hypo. and the length of the adj. side?
cos theta = (adjacent side) / (hypotenuse)
Then cos 30 degrees = x / 17 units, or (17 units) cos (30 degrees) = x
Use your calculator to find the value of cos 30. Multiply your result by (17 units).
The result is your answer (the length of the horiz. side, DF).
Answer:
12% decrease
Step-by-step explanation:
You need to answer this question: What percent of 500 is 440? If you get the answer in a percentage, it will be the percent decrease of this situation.
The answer would be 88%. Meaning 440 is 88% of 500.
This would also mean 500-440 is 100%-88%. 60 is 12%.
Since the difference between 500 and 440 is 12% the answer is above.
Hope this helps, please mark brainliest!
Answer:
a) The number of CDs Ahmed has
Hope it helps...