If 65 people attend a concert and tickets for adults cost $2.75 while tickets tickets for children cost $1.75 and total receipts for the concert was $147.75, how many of each went to the concert?

34 adults, 31 children

Step-by-step explanation:

First, we need to get an equation that shows how many adults (x) and children (y) attended.

1. x + y = 65

Now we need an equation that gives the total cost of the concert tickets.

$2.75x + $1.75y = $147.75

Now, using the method of elimination, we will multiply the first equation by -1.75 and add it to the second equation to eliminate a variable.

-1.75x - 1.75y = -113.75

2.75 + 1.75 = 147.75

x = 34

Now, we know how many adults went to the concert. We can now solve for how many children went.

34 + y = 65

-34         -34

y = 31

31 children went to the concert.

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the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950