Is the ordered pair (-9,15) a solution to: 5x+4y>10

yes

Step-by-step explanation:

5x+4y>10

Substitute the point in and see if the inequality is true

5(-9) + 4(15) > 10

-45 +60 > 10

15 > 10

This is true so the point is a solution

39

Step-by-step explanation:

The rate of change is found by

f(x2) -f(x1)

x2 -x1

x2 is 3 and x1 is 1

f(3) = 3 x^3 +1 = 3(3)^3 +1 81+1 =82

f(1) = 3(1)^3 +1 = 3+1 =4

82 -4

3-1

78

2

39