❄ Hi there,
keeping in mind that the sum of complementary angles is 90°,
set up an equation, letting
be x –
{and we know that
}




__________
Keeping in mind that a right angle is 90°,
set up an equation, letting
be x:
{and we know that
}



❄
The 15th arrangement will have both a blue and red ribbon
Answer: 
Step-by-Step Explanation:
Let's solve for
.

Step 1: Multiply both sides by
.

Step 2: Multiply both sides by
.

Step 3: Add
to both sides.


Step 4: Add
to both sides.


Step 5: Add
to both sides.


Step 6: Factor out variable
.

Step 7: Divide both sides by
.


Answer:

It will be the last one a×b×b
I can’t see the problem very well, but your answer should be the one with (-3/2,0) as the intersecting point on the graph.