Hello, Harryhit4!

Your chart is not quite correct . . .A man invested $1200 for one year, part at 4% and part at 6%.

He earned $58 from his investments.

How much did he invest at each rate?

He invested dollars at 4%.

. . His interest is: . dollars.

He invested the other dollars at 6%.

. . His interest is: . dollars.

His total interest is $58.

Thereis our equation: .

We will use: .Jake can run downhill at a rate 2 times faster than he can run uphill.

If the distance each way is 5km, and the total time for the trip is 30 minutes,

what is his rate downhill?

Let = Jake's uphill speed (in km per hour).

Then = Jake's downhill speed.

Running 5km uphill at kph, his time is: . hours.

Running 5km downhill at kph, his time is . hours.

His total time is hour (30 minutes).

Thereis our equation: .