Which is a correct way of evaluating the expression 15x + 30x for x = 2? .

15x + 30x=90 when x=2

Step-by-step explanation:

15x + 30x     plug in 2 for x

15(2) + 30(2)=30 + 60=90

or

15x + 30x=45x     plug in 2 for x

45(2)=90

29933333.33

step-by-step explanation:

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.