9+2j=-9-j
+j
9+3j=-9
-9 -9
3j=-18
/3j /3j
j=-6
but in words that would be 9+2j=-9-j plus the j over to the 2j that becomes 3j then minus the 9 over and you get -18 so now you you have 3j=-18 divide by 3 and you get -6
So if you take the derivative of this function, you get (dx/dt)(y) + (dy/dt)(x) + (dx/dt) = 0. Plug in dx/dt, x, and y into the function. (-3)(5) + (2)(dy/dt) + (-3) = 0. Isolate dy/dt. 2dy/dt = 18, so dy/dt = 9.
Answer:
-8.9
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
Substitute in the values
2 X 3 = 6
21 - 6 =15
Answer:
- 65 60-pound boxes
- 60 30-pound boxes
Step-by-step explanation:
If all were 30-pound boxes, the total weight would be 30·125 = 3750 pounds. The actual weight is 5700-3750 = 1950 pounds more than that. Each 60-pound box that replaces a 30-pound box increases the weight by 30 pounds, so there must have been 1950/30 = 65 such replacements.
The truck is carrying 65 60-pound boxes and 60 30-pound boxes.