CommentBy similar triangles it can be shown that AD^2 = AB*AC
If you want the proof, Google tangents and secants of a circle.
FindSo we want
AB
GivensAD = 16
BC = 9
AB = ??
CA = CB + AB
CA = 9 + AB
FormulaAB * (AB + BC) = AD^2
Sub and SolveAB*(AB + 9) = 16^2
AB*(AB + 9) = 256 Remove the brackets.
AB^2 + 9AB = 256 Subtract 256 from both sides.
AB^2 + 9AB - 256 = 0
You can only do this either with a graph or the quadratic formula. I'll get the graph for you. You can made these yourself at Desmos.
x = [-b +/- sqrt(b^2 - 4ac)] / (2a)
a = 1
b = 9
c = -256
AnswerWhen you substitute these into the quadratic formula, you get
x1 = 12.12 and
x2 = -21.12
x2 is meaningless. The solution is
x = 12.12
CommentBut that's not your question. Your question is what is this rounded to the nearest 1/10th? That's a fancy way of saying round to the first decimal place. Since the hundredth place (or second place) is 2, 12.12 rounds to 12.1
The answer is
x = 12.1 <<<<< answer.
Answer:
15km
Step-by-step explanation:
Answer: 26 × 4
Step-by-step explanation: There are 26 letters in the alphabet lettered A through Z.
Deepak is given the choice of picking a four letter password of his liking, using any four letters. Since the letters he uses can be repeated, it is 26 * 4 possibilities, since there are 26 different possibilities of letters from the alphabet he could choose, for 4 times. Also, since letters can be repeated, 26 stays the same. If letters could not be repeated, it would be 26 * 25 * 24 * 23.
Answer:
its the 3rd one
Step-by-step explanation:
because x=4 and y=28 so 4 times 7 =28
Your steps are to add all of the prices together and then divide by three. Your answer would be $3.50 as an average price.