3x - 5y = 18 over
-10x + 5y = 10
Add them because the 5y's have the right symbols for us to add
-7x = 28
Divide
x = -4
Now you can plug in -4 for x in one equation, I would use the first equation!
3(-4) - 5y = 18
-12 - 5y = 18
Add 12
-5y = 30
Divide
y = -6
Your solutions are going to be:
x = -4
y = -6
To check your work plug x and y into one equation:
3(-4) - 5(-6) = 18
-12 + 30 = 18
18 = 18
Since 18 does equal 18 you know that your solution's work!
Answer:
a=1.015625
Step-by-step explanation:
Let's solve your equation step-by-step.
28a+43.75=12(a+5)
A. SS = r²(SS_x)
B. SS = (1-r²)(SS_x)
C. SS = r²(SS_y)
D. SS= (1-r²)(SS_y)
The residual sum is given in the picture below so it is D which is correct.
Answer:
charles
Step-by-step explanation: