You can calculate it using the law of cosines: c^2=a^2+b^2-2*a*b*cos(C)
your triangle is
CD=15=a
CE=?=b
DE=CE+3=b+3=c
and C=90°
-> insert those values, with c substituted with b+3 to remove c
c^2=a^2+b^2-2*a*b*cos(C)
(b+3)^2=15^2+b^2-2*15*b*cos(90)
cos(90)=0->
(b+3)^2=15^2+b^2
b^2+2*3*b+3^2=225+b^2
6b+9=225
6b=216
b=36=CE
DE=CE+3=36+3=39
For number 16, keep the slope and plug in the values of x and y and solve for the y intercept. For 20 take the opposite reciprocal and then plug in the values of x and y and solve for y intercept. For number 24 and 25 convert both into slope intercept form (y=mx+b) and see if they are parallel or perpendicular
Answer:
guess the answer!
Step-by-step explanation:
Answer:
0.5789
Step-by-step explanation:
The successful events would be 34 , 40 41 42 43 44 45 46 47 48 49
The total number of ways 19 when you count from 31 to 49
P(1 four) = 11/19 = 0.5789
In the tip to tail method of ading vectors, the tail of a second vector is moved to the tip(head) of the first vector.
So, in the addition of vectors, V+W, the tail of W is placed to the tip of V.
So, the given statement is true.
