<span>Earths crust mineral composition are silicon oxide (SiO2),Magnesium monoxide (MgO),Ferrous oxide(FeO),Calcium monoxide (CaO),Sodium dioxide(Na2O) ,Potassium dioxide(K2O), while the Earths crust are sodium,magnesium,potassium,calcium,iron,aluminum,silicon,and oxygen .Because Earth is based on chemical composition and split up into a crust,mantle,outer core and inner core.</span>
Answer: b
Step-by-step explanation:
Answer:
the equation that should be required is 0 = 2t
Step-by-step explanation:
Let us assume the hours of television be t
And, for hours outdoor be o
As the hours outdoors would be twice the hours of television so the equation is
0 = 2t
Therefore the equation that should be required is 0 = 2t
The same is relevant
(1) This series consists of terms of an arithmetic sequence:
179 - 173 = 6
173 - 167 = 6
and so on, so that the <em>n</em>-th term in the series is (for <em>n</em> ≥ 1)
<em>a(n)</em> = 179 - 6 (<em>n</em> - 1) = 185 - 6<em>n</em>
Then the sum of the first 53 terms is
(2) This series has terms from a geometric sequence:
-12 / 6 = -2
24/(-12) = -2
-48/24 = -2
and so on. The <em>n</em>-th term is (again, for <em>n</em> ≥ 1)
<em>a(n)</em> = 6 (-2)ⁿ⁻¹
and the sum of the first 19 terms is
Multiply both sides by -2 :
Subtracting this from the first sum gives
and solving for the sum, you get