6. if z = -3, then what is z2 – 2 + 1?
7. if y= -5, then what is 3y2 + 7y -4?
8. if a = 6 and b = -2, what is (a-b)/(a+b)?
9. if m = 4 and n = 3, what is (m2 - n2)/ (m2 + n2)?
10. if x=4 and y= 12, what is 1/x + 1/y

the red lines denote the population of the bacteria after 35 hours. that would be 2,409.24. the y-intercept is the blue line which is 800 because that is the starting point. the equation used to make the graph is 800(1.032)^h, where h is the number of hours.

step-by-step explanation:

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180

4+4+2x

or

2x+8

step-by-step explanation: