Use the distributive property to expand the expression. 5x2 − (6x − 4y) + 9z

A) 5x2 − 6x − 4y − 9 z
B) 5x2 − 6x + 4y − 9 z
C) 5x2 − 6x − 4y + 9 z
D) 5x2 − 6x + 4y + 9 z

D)5x2-6x+4y+9z

Step-by-step explanation:

The question given is 5x2 − (6x − 4y) + 9z

When we open the btacket by multiplying with negative sign hence you get the answer as D) 5x2 − 6x + 4y + 9 z

choice b is correct

step-by-step explanation:

we have been given the following system of linear inequalities;

we are required to graphically determine the solution to these system of inequalities. using a graphing tool, the solution is as shown in the attachment below;

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6