Answer:
1. Equation: 
2. Total pay if Henry sells 27 copies:
Step-by-step explanation:
1. The equation of the line in Slope-Intercept form is:

Where "m" is the slope and "b" is the y-intercept.
According to the information given in the exercise, his base salary is $2,100. So you can identify that:

Since he makes an additional of $90 for every copy of he sells, you can identify that:

Therefore, the equation that represents this situation is:

2. If he sells 27 copies, then:

Substituting this value into the equation, you get that his total pay would be:

Answer:
Step-by-step explanation:
x² + y² + 42x + 38y - 47 = 0
Put the equation into standard (center-radius) form:
regroup terms
(x²+42x) + (y²+38y) = 47
complete the squares:
(x²+42x+21²) + (y²+38y+19²) = 47 + 21² + 19²
(x+21)² + (y+19)² = 849
center at (-21,-19)
radius = √849 units
The general form of the equation for a circle with radius √849 units is:
(x-h)² + (y-k)² = 849
where the (h,k) is the center.
Answer:
your answer would be B :)
Step-by-step explanation: