Gerry has two different part-time jobs, and he had work 20 hours per week at each job. he earns $8 per hour at one job. which expression represents how much gerry earned last week if he earns d dollars per hour at this other job?
a- 20+20d
b- 160+ 20d
c- 40+ d
d- 160+ 8d
pl answer

The correct answer for the question that is being presented above is this one: "Last week's earnings = 40d."

Gerry has two different part-time jobs, and he had work 20 hours per week at each job. He earns $8 per hour at one job. 

Last week's earnings = 20d + 20d
Last week's earnings = 40d.

A. Yes, overdetermined systems can be consistent.

As, the system of equations below is consistent because it has a solution

, , .

Step-by-step explanation:

We have,

'Over-determined system is a system of linear equations, in which there are more equations than unknowns'.

For e.g. Let us consider the system,

2x - 3y = 1

3x - 2y = 4

x - y = 1

Plotting these equations, we see from the graph below that,

The only intersection point is (2,1). Thus, x= 2 and y= 1 is the solution of this system.

Thus, over-determined system can be consistent.

According to the options,

Option C is not correct as,

, implies .

Hence, option A is correct.