Answer:
x=3, y=-1
Step-by-step explanation:

Double the first equation, then add the second
6x+2y=16
+ 2x-2y=8
The y's cancel each other out.
8x=24
x=3
Solve for y
6-2y=8
2y=-2
y=-1
Double check:
6(3)+2(-1)=16
18-2=16
Yay!
Thomas is 5 more than twice D's age
T = 2D + 5
5 + 2x should be your answer
hope this helps
Answer:
Area of the triangle = 32in^2
Area of rectangle = 144in^2
Area of rectangle without triangle = 112in^2
Answer:
3
Step-by-step explanation:
This experiment has four groups. Each of these groups have six observations
Total number of observations = 4 x 6 = 24
Treatment degrees of freedom can be gotten by using this formula
Df1 = K - 1
= 4-1
= 3
Therefore for this question, the treatment degrees of freedom is given as 3 and the correct answer option is b.