Explanation:
Consider the example: 5² = ( 5 × 5) = 25.
Here 5 is called the square root of 25. 25 is a perfect square. So the square root of 25 is 5.
The 1st row has 15 chairs.
The 2nd row has 15 + 3 = 18 chairs.
The 3rd row has 18 + 3 = 15 + 2•3 = 21 chairs.
The 4th row has 21 + 3 = 15 + 3•3 = 24 chairs.
The pattern continues, so that the n-th row has 15 + (n - 1)•3 = 3n + 12 chairs.
If there are 15 rows, then the total number of chairs is

where we use the formulas


Answer:
A
Explanation:
because the reason why he can catch a ball 8n the air is because of the brother staying with him and teaching him tricks
Answer:
D and E
Explanation:
Hope this helps. If it did, mark as brianliest. Thanks!
Answer:
volume of the mixture is (0.575+0.300)-----> 0.875 m³
Explanation:
we know that
density=mass/volume--------> volume=mass/density
step 1
find the volume of water
mass=575 kg
density of water=1000 kg/m³
volume of water=mass/density-----> 575/1000----> 0.575 m³
step 2
find the volume of ice
mass=275 kg
density of ice=916 kg/m³
volume of ice=mass/density-----> 275/916----> 0.300... m³
the volume of water is 0.575³
the volume of ice is 0.300.. m³
volume of the mixture is (0.575+0.300)-----> 0.875 m³