Answer:
The answer to your question is x = -0.6, y = 0 or (-0.6, 0)
Step-by-step explanation:
Equations
-2x + 3y = 1.2 ------------------ (I)
-3x - 6y = 1.8 ------------------ (II)
Solve equation I for y
3y = 2x + 1.2
y = 2/3x + 1.2/3
Substitute in equation II
-3x - 6(2/3x + 1.2/3) = 1.8
Simplification
-3x - 4x - 2.4 = 1.8
Solve for x
-7x = 1.8 + 2.4
-7x = 4.2
x = 4.2/-7
x = - 0.6
Find the value of y
y = 2/3 (-0.6) + 1.2/3
y = -0.4 + 0.4
y = 0
Answer:
n = 3
Step-by-step explanation:
We use log to find <em>n.</em>
log₂(8) = 3
2³ = 8
I am sure it is A !
if you need explanation, comment ! or it is ok !
SOLUTION
![\begin{gathered} a\text{. }\frac{-1}{3}\text{ + }\frac{6}{7} \\ \\ \frac{-7+18}{21} \\ \\ \frac{11}{21} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20a%5Ctext%7B.%20%7D%5Cfrac%7B-1%7D%7B3%7D%5Ctext%7B%20%2B%20%7D%5Cfrac%7B6%7D%7B7%7D%20%5C%5C%20%20%5C%5C%20%5Cfrac%7B-7%2B18%7D%7B21%7D%20%5C%5C%20%20%5C%5C%20%5Cfrac%7B11%7D%7B21%7D%20%5Cend%7Bgathered%7D)
b.
![\begin{gathered} \frac{15}{16}-\frac{3}{4} \\ \\ \frac{15-12}{16} \\ \\ \frac{3}{16} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Cfrac%7B15%7D%7B16%7D-%5Cfrac%7B3%7D%7B4%7D%20%5C%5C%20%20%5C%5C%20%5Cfrac%7B15-12%7D%7B16%7D%20%5C%5C%20%20%5C%5C%20%5Cfrac%7B3%7D%7B16%7D%20%5Cend%7Bgathered%7D)
c.
![\begin{gathered} \frac{7}{6x}+\frac{-4}{3y} \\ \\ \frac{7y-8x}{6xy} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Cfrac%7B7%7D%7B6x%7D%2B%5Cfrac%7B-4%7D%7B3y%7D%20%5C%5C%20%20%5C%5C%20%5Cfrac%7B7y-8x%7D%7B6xy%7D%20%5Cend%7Bgathered%7D)
So we just have to find the LCM of the denominators, then we perform the rule of addition of fraction