3x - 5y = 5 ——> 6x - 10y = 10
6x - 10y = 10
x + 10y = 4
——————-
5x = 6
x = 1.2
1.2 + 10y = 4
10y = 2.8
y = 0.28
so, x = 1.2 and y = 0.28
hope this helps :)
The correct answer is: 8.8 x 10^15
I think it is "N". This, because (2+3)=5 and E is the 5th letter of the alphabet. 4+5= 9 and I is the 9th letter of the alphabet. (6+8)= 14 So N should be correct I think. :)
Use the Pythagorean theorem since you are working with a right triangle:
a^2+b^2=c^2a2+b2=c2
The legs are a and b and the hypotenuse is c. The hypotenuse is always opposite the 90° angle. Insert the appropriate values:
0.8^2+0.6^2=c^20.82+0.62=c2
Solve for c. Simplify the exponents (x^2=x*xx2=x∗x ):
0.64+0.36=c^20.64+0.36=c2
Add:
1=c^21=c2
Isolate c. Find the square root of both sides:
\begin{gathered}\sqrt{1}=\sqrt{c^2}\\\\\sqrt{1}=c\end{gathered}1=c21=c
Simplify \sqrt{1}1 . Any root of 1 is 1:
c=c= ±11 *
c=1,-1c=1,−1
