Answer:
25 years
Step-by-step explanation:
To find the mean you need to find the sum of all numbers and divide by the number of terms there are.
In this case you would need to multiply the mean ages by the number of people used to find the mean:
35 * 3 = 105
23 * 12 = 276
Then add the total ages together:
105 + 276 = 381
Then divide by the number of total people in the office:
12 + 3 = 15
381/15 = 25.4
rounded to 25
7x1=7, then 4x1/4= 4x1=4 divided by 4= 1. Then subtract 7- 1= 6
3/4 y= 24
Multiply both sides of the equation by 4/3 (the reciprocal of 3/4) to be left with y.
4/3 × 3/4y = 24 × 4/3
y = 24 × 4/3
y = 32
Hope this helps!
Answer:
a. y + 7
b. y - 4
c. y times 3 or 3y
d. 3y + 30
e. 6y + 8
Step-by-step explanation:
Algebraic expressions don't need to be a complete equation.
Answer:
It is really easy. First off you just subtract by 3
Step-by-step explanation: 21-3=18 and on.
