Maria has to spend 5 1/2 hours to finish her community service program in a community health clinic. Last week, she was able to spend 3 3/4 hours. Which equation can be used to determine the number of hours, h , that Maria still needs to spend to complete her service program?(1 point)
h = 5 1/2 - 3 3/4
these are the option:
h − 5 1/2 = 3 3/4
h + 3 3/4 = 5 1/2
h − 3 3/4 = 5 1/2
h + 5 1/2 = 3 3/4
The correct equation is:
h = 5 1/2 - 3 3/4
To determine the number of hours that Maria still needs to spend to complete her service program, you can subtract the time she has already spent (3 3/4 hours) from the total time she needs to spend (5 1/2 hours).
The equation that can be used is:
h = Total time - Time already spent
Or, substituting the given values:
h = 5 1/2 hours - 3 3/4 hours
To subtract mixed numbers, it is helpful to convert them into improper fractions:
5 1/2 = 11/2
3 3/4 = 15/4
So, the equation that can be used to determine the number of hours, h, that Maria still needs to spend to complete her service program is:
h = 11/2 - 15/4