Since 30 lights are 40% of them:
30*2= 60
Since 2*40= 80
We still need the 20 percent.
Half of 40= 20.
30/2= 15
So, 15+60= 75
75 is the number of lights on the tree.
I hope this helps!
~cupcake
The answer to your question is 54
Answer:
I am unsure aswell please let me know.
Step-by-step explanation:
Answer: 15
Step-by-step explanation:
20/8=2.5
6*2.5=15
Answer:
37) ±√29 - 4
Completing the square utilizes this formula . We know that b=8, 8 can be plugged into this formula to get . Simplify to get 16. Now, we can add this into the equation to get . Subtract 26 to both sides, so the equation can equal to 0. would be the resulting equation. Now, let's use quadratic formula to find the solution. The quadratic formula is (-b+-√b^2-4ac) / 2a. Plug in all of our values to get (-8+-√8^2-4(1)(-13)/2(1). Simplify the equation to get ±√29 - 4.
38) ±√21 - 2
Let's use the same formula. b=4, so . Simplify to get 4. Add that into the equation to get . Subtract 8 on both sides, so the equation can equal to 0. would be the result. Use the quadratic formula again to find the solution. Plug in all of the values to get ±√21 - 2
If you're confused on any part of the explanation, feel free to ask :)