Answer:
y=44x+178
Step-by-step explanation:
Refer to the picture that given
238 messages.
59.50 divided by 0.25 equals to 238
Answer:
Slope = -3/4
y-intercept = 2
Step-by-step explanation:

Answer:
x²+1/x² = 51
Explanation:
Given x - 1/x = 7 ---(1)
We know the algebraic identity:
a²+b²-2ab = (a-b)²
Or
a²+b² = (a-b)²+2ab
Now,
x²+1/x²
= (x-1/x)²+2*x*(1/x)
= (x-1/x)²+2
:7²+2 [ from (1)] =
= 49+2
= 51
Therefore,
x²+1/x² = 51