Answer:
D.
Step-by-step explanation:
Substitution is plugging in a value for a variable to help solve the problem or equation.
<span>for example </span><span>"Substitute 5 into x" means plug 5 into x </span>
S--------T--------U
ST = T U
SU = 10
ST + TU = SU
3x + 7x = 10
10x = 10
x = 10/10
x = 1
So, what do you think happens next?
ST = 3x
Let x = 1
ST = 3(1)
ST = 3
I hope this helps.
Ab=10
a^2+b^2=30
((a+b)^2=a^2+2ab+b^2=a^2+b^2+2*10=30+20=50
Answer:
x=1
Step-by-step explanation:
7/3 x + 1/3x = 1 + 5/3 x
Combine like terms
8/3 x = 1 +5/3 x
Subtract 5/3 x from each side
8/3x -5/3x = 1 + 5/3x -5/3x
3/3x = 1
x =1