During a research experiment, it was found that the number of bacteria in a culture grew at a rate proportional to its size. At 7:00am there were 6,000 bacteria present in the culture. At noon, the...

Use exact arithmetic to solve the following system:
10-3x-y=1,
x+y=0.
The book says the answer is (1/1.001, -1/1.001). Please show all your work step by step...

Use 3-digit arithmetic with no pivoting to solve the following system:
10-3x-y=1,
x+y=0.
The book says the answer is (0, -1). Please show all your work step by...

Use 3-digit arithmetic with partial pivoting to solve the following system:
10-3x-y=1,
x+y=0.
The book says the answer is (1, -1). Please show all your work step...

3x^2+15x=108 I've been on this problem for days now for my summer work and I've googled how to solve it and I still don't understand help would be very appreciated

In a certian year, solar and wind energy generation totaled 1015 trillion BTUs. Wind generated 52 trillion btus eight times that generated by solar energy. How much was generated by each source?
Solar...