Answer:
R = (- 3, 8 )
Step-by-step explanation:
Using the midpoint formula , equate the coordinates to the corresponding coordinates of Q.
let R = (x, y ) , then
(x + 11 ) = 4 ( multiply both sides by 2 )
x + 11 = 8 (subtract 11 from both sides )
x = - 3
(- 2 + y) = 3 ( multiply both sides by 2 )
- 2 + y = 6 ( add 2 to both sides )
y = 8
Thus
R = (- 3, 8 )
Answer:
Step-by-step explanation:
X>35
To answer this you can use a guess and check strategy.
Start with 5 minutes using it (25% lost) and 10 minutes charging (20% gained).
Try 7 minutes using it (35% lost) and 14 minutes charging (28%).
Next, 9 minutes (45%) and 18 minutes(36%).
10 minutes (50%) and 20 minutes (40%). This is the difference.
She used it for 10 minutes and charged it for 20 minutes.
Answer: Adults = 58
Children = 42
Step-by-step explanation:
Let adults be denoted as a
Let Children be denoted as c
a + c = 100 ...... i
10a + 5c = 710 ...... ii
Multiply I by 5
Multiply ii by 1
5a + 5c = 500 ...... iii
10a + 5c = 710 ...... iv
Subtract iii from iv
5a = 210
a = 210/5
a = 42
Since a + c = 100
c = 100 - 42 = 58.
Adults = 58
Children = 42
