We know that
• Philip earns $15 an hour of tutoring.
,• He earns $10 an hour babysitting.
,• He worked 10 hours of tutoring and 4 hours of babysitting.
Using the given information, we can express the following.
[tex]15(10)+10(4)[/tex]We solve the products, then we sum.
[tex]150+40=190[/tex]