As a lifeguard, sara earns a base pay of $80 per day. if her day involves swim instruction, sara earns an additional 9t dollars,
where t represents the number of hours she gives instruction and $9 is her hourly rate. The total amount Sara earns in a day can be expressed as 80 + 9t. (a) What does 9t represent in this context?
(b) What are the terms and the coefficients in the expression 80 + 9t
(c) Rewrite the expression for 7 hours of swim instruction.
Solve using system of equations! Let y=total amount of money and x=hours of overtime. mall: y=400+15x movies: y=360+20x Solve! Set the equations equal to each other to find x. 400+15x=360+20x 40=5x x=8 After 8 hours of overtime the movies would pay her more.
He spent $36 on safety equipment. The total cost each time was $11, meaning he had to pay 9 times for each skate session. 4x9=36! ( 7x9= 63 so if you add 36 you'll get 99 just as a way of checking)
