Answer:
When t = 4
Step-by-step explanation:
The phone will hit the ground when h = 0.

However, as time cannot be negative, we know the answer is when t = 4.
Answer:
1.A matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns.
2.
Solution given:
We have
Sin²
-Cos ²
=1
Sin²
=1+Cos²
Sin
=
3.
4Tan²
+4Cot²
-3Tan²
-3Cot²
4Tan²
-3Tan²
+4Cot²
-3Cot²
Tan²
-Cot²
Answer:
2=4x+7
Step-by-step explanation:
Step 2! The reason for that is the student didnt multiplied (15-2z) with -2. But she should have!
This looks blury can you get it a little more clear or I think it is just me!