1. 21j-26+4j=21+6-2j
2. 25j-26=27-2j
3. 27j=53
4. j=53/27
hope this helps!!
There are a number of things you can try.
1. Why can't you talk to your teacher? That's always possible or it should be.
2. You can find someone else whom you know that can do math. Attach yourself to them until you can do your math alone.
3. Come here. Answer questions that you can do. Build up your points so that you can ask questions. Ask them. When you find someone on here that consistently knows what they are doing, make contact with them.
4. Offer just slightly more than 5 + 3 points. like maybe 7 and 4
5. Don't cheat. Put up questions that you need explanations for that are homework questions. The mods here are pretty strict, and they are quick to jump on to things that they can prove are cheating.
Circumference of a circle is C = 2πr.
part 1)
so the radius of the smaller gear is 3 inches, so after a full rotation, namely a revolution, the smaller gear has covered an arc of 2π(3), or 6π.
what angle has the larger gear of 7 inches in radius, has it covered with an arc of 6π?

part 2)
since the larger gear has a radius of 7, in a revolution it will have an arc of 2π(7), or 14π.
now, we know the smaller gear does a 6π arc in a revolution, how many revolutions will it do in an arc of 14π?
First, find the function that represents x and y.
x is the number of 8 oz jars
y is the number of 16 oz jars
function: 8x + 16y = 240
x-intercept: y = 0 => 8x = 240 => x = 30 => (30,0)
y-intercept: x = 0 => 16y = 240 => y = 15 => (0, 15)
Answer: (0,15) and (30,0)