Answer:
7.80
Step-by-step explanation:
46.80 divided by 6 is 7.80
Explanation:
The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.
y = (4*10^8)^2 Both factors in the brackets are squared.
4^2 = 16
(10^8)^2 = 10^(2*8) = 10^16
y = 16 * 10^16
y = 1.6 * 10^1 * 10^16
y = 1.6 * 10^(1 + 16)
y = 1.6 * 10^(17) <<<<<< Answer I'd use the brackets unless instructed not to.
Answer:
Janet has coins worth 252.5, 101, and 50.5.
Step-by-step explanation:
Let us call the three coins , and .
The first coin is 5 times another coin<em> (let's say </em>); therefore,
,
and the third coin is 2 times the value of another coin<em> (it's coin </em><em>):</em>
<em /><em>.</em>
The total worth of all coins is 404; therefore,
or
with the value of in hand, we find and :
and for
Thus, Janet has 3 coins worth 252.5, 101, and 50.5.