Answer:
Step-by-step explanation:
<u>Mean of four numbers a, b, c, and d is 8:</u>
- (a + b + c + d)/4 = 8
- ⇒ a + b + c + d = 32
<u>Mean of seven numbers x, y, z, a, b, c and d is 12:</u>
- (x + y + z + a + b + c + d)/7 = 12
<u>Substitute the sum of 4 numbers:</u>
- x + y + z + 32 = 7*12
- x + y + z = 84 - 32
- x + y + z = 52
<u>Mean of x, y and z is:</u>
Answer:
The answer is 5 people
Step-by-step explanation:
This is because 30/6 equals 5
y=(-2/5)x + 6
Step-by-step explanation:
y-6= (-2/5)x or y=(-2/5)x + 6
Answer:
x = 9
y = 3
Step-by-step explanation:
2x + 2y = 24 is the same as x + y = 12
using substitution, x = 12-y
12 - y = 3y
12 = 4y
y = 3
x = 3(3)
x = 9
Answer:
$43.65
Step-by-step explanation:
1. divide 48.50 by 10
4.85
2. subtract 4.85 from 48.50
3. your answer would be $43.65
