Answer:
52
Step-by-step explanation:
Answer:
607,261
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
f(x) = -x^2
f(3) = -3^2
f(3) = 9

Step-by-step explanation:
Let's rewrite the given equation such that only y is on the left side and everything else on the right side:

Simplifying this by dividing by 6, we get

This line has a slope of -1/2, which means that a line perpendicular to this has a slope of 2 (i.e., negative reciprocal). So we can write its equation as

This is the slope-intercept form of the equation of the line perpendicular to our given line. To complete this form, we need to find the value of b. Since this line passes through (1, -7), put these numbers into our equation to get

Therefore, the slope-intercept form of the equation can be written as

y=4x+40
x represents the number of minutes
y is the total
40 because he already graded 40 papers, and 4x because that's how many phred grades times the number of minutes