B. they are directly proportional because she keeps taking 3 at a time to his 1 at a time.
Your equations are right. just use the substitution method to solve. substitute y because both have that on one side
it'll look like 40x+30=30x+60.
then just get x in one side. I showed my owrk in the photo
Answer:
tn = 8n -7
Step-by-step explanation:
given : t2=9, t4=25
the formula is:
tn = t1 + (n-1) d
gonna find d first:
d = (25-9) /(4-2) = 16/2 = 8
and find tn1:
t1 = 9-8 = 1
so, tn = 1 + (n-1) (8) = 1 +8n -8
tn = 8n -7
The answer is:
50(16n+21)
Answer: <u><em>x=8</em></u>
Step-by-step explanation:
Simplifying
3(x + -2) = 18
Reorder the terms:
3(-2 + x) = 18
(-2 * 3 + x * 3) = 18
(-6 + 3x) = 18
Solving
-6 + 3x = 18
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '6' to each side of the equation.
-6 + 6 + 3x = 18 + 6
Combine like terms: -6 + 6 = 0
0 + 3x = 18 + 6
3x = 18 + 6
Combine like terms: 18 + 6 = 24
3x = 24
Divide each side by '3'.
x = 8
Simplifying
x = 8
