1. If x people working together make a total of y dollars after an hour of work. how much money will z people make if they work 4 hours at the same rate per person ?

2.Each of the n members of an organization may invite up to 3 guests to a conference. What is the maximum number of members and guests who might attend the conference?

A. n + 3
B. 3n
C. 3n + 4
D. 4n
E. 4n + 4

1. Amt = (Y/X) * 4 * Z = 4YZ/X Dollars.

2. n + 3n = 4n.

1. To solve this problem, we need to use the concept of proportionality. We know that x people working together make a total of y dollars in one hour.

First, let's find out how much money one person makes in one hour. To do that, we divide the total amount of money (y) by the number of people working (x):

Money per person per hour = y / x

Now, we need to find out how much money z people will make if they work for 4 hours. To do that, we multiply the money per person per hour by the number of people (z) and the number of hours (4):

Total money earned by z people in 4 hours = (y / x) * z * 4

Therefore, the answer is (y / x) * z * 4.

2. To determine the maximum number of members and guests who might attend the conference, we need to understand the invitation rules. Each member can invite up to 3 guests.

Now, if each of the n members invites 3 guests, we can calculate the total number of attendees:

Number of guests = 3 guests/member * n members = 3n

But we also need to consider the number of members attending the conference themselves. This is given by the variable n.

Therefore, the maximum number of attendees (members and guests) can be calculated by adding the number of members (n) and the number of guests (3n):

Total number of attendees = n + 3n = 4n

So, the correct answer is option D: 4n.