Astudent buys a selection of drinks and hamburgers for their friends at a football game. if the student bought 10 items in total for $24 and drinks cost $2 and hamburgers cost $4, how many drinks were purchased?

8 drinks were purchased.

Step-by-step explanation:

We can use two equations to describe this problem. Then we solve a system of equations in two variables to find the solution.

1) number of items

Let h = number of hamburgers

Let d = number of drinks

Sum of the number of items bought is h + d.

We are told 10 items in total were bought, so h + d = 10

That is our first equation.

2) cost of items

One hamburger costs $4; h hamburgers cost 4h.

One drink costs $2; d drinks cost 2d.

The sum of the costs of the hamburgers and drinks is 4h + 2d.

We are told the total cost is $24, so 4h + 2d = 24. That is our second equation.

We have a system of equations:

h + d = 10

4h + 2d = 24

We will now solve the system of equations using the substitution method.

Solve the first equation for h.

h + d = 10

h = 10 - d

Now substitute 10 - d for h in the second equation.

4h + 2d = 24

4(10 - d) + 2d = 24

Now we have one equation in one variable, so we can solve for d.

40 - 4d + 2d = 24

40 - 2d = 24

-2d = -16

d = 8

8 drinks were purchased.

i will pick c put check it over to be sure

step-by-step explanation:

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )