Pls soon! : ) question- the difference of the square of a number and three times the sum of the number and 7 is more than the product of that number and 15. select the inequality that can be used to determine the unknown number. a. x2 + 3x ≥ 15 + x b. x2 - 3x + 7 ≥ 15x c. x2 - 3x - 21 > 15x d. x2 - 3x + 21 > 15 + x

C.

Step-by-step explanation:

Let x be the unknown number,

So, the square of the number =

Three times of the sum of number and 7 = 3(x+7),

Also, the product of the number and 15x,

Thus, The difference of the square of a number and three times the sum of the number and 7 is more than the product of that number and 15.

⇒  ( sign '>' is used for more than )

⇒   ( Apply distributive property on left side )

Hence, option 'C' is correct.

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.