Answer:
x = 27/7 and y = -3/7
Step-by-step explanation:
In order to solve this, we will first solve the first equation for y.
y + 4 = 2/3(x -1)
y + 4 = 2/3x - 2/3
y = 2/3x - 14/3
Now we can plug the value of the equation in for y in the second equation and use it to solve for x.
x + 2y = 3
x + 2(2/3x - 14/3) = 3
x + 4/3x - 18/3 = 9/3
7/3x - 18/3 = 9/3
7/3x = 27/3
x = 27/7
Then we can use this value to find the value of y.
x + 2y = 3
27/7 + 2y = 3
27/7 + 2y = 21/7
2y = -6/7
y = -3/7
According to the weather station, the temperature was –4 degrees Celsius last night. And today, it is now –10 degrees Celsius.
What was the change in temperature over night?
Answer: 6 degrees Celsius
Solution:
= -4 – (-10)
= -4 + 10
= 6 degrees Celsius