Step-by-step explanation:
Let (x, y) be the coordinates of point B.
(4, 6) => (-2, 4) => (x, y)
We have 2(-2) = 4 + x and 2(4) = 6 + y.
Solving these, we get x = -8 and y = 2.
Hence the coordinates of point B is (-8, 2).
A)
75% she knows for sure
Out of the remaining 25%, she has a 1/5 or 20% chance of getting it right. So,
1/4 x 1/5 x 100 = 5%
Total chance of getting a question right:
75 + 5 = 80%
b) If the total is 40, she can expect to get
80% x 40 = 32 questions correct.
Answer:
x=5
Step-by-step explanation:
4x+2=2x+12
4x-2x=12-2
2x=10
x=10/2
x=5
Answer:
0.
Step-by-step explanation:
3(2-2)
Distribute 3 to -2 and you would get 6.
Then you would distribute 3 too -2 and get -6.
After, you would have 6-6, which is 0.
