When modeling word problems as mathematical equations, which of the following is a synonym for the division operation? a. difference b. decreased c. per d. combined

First, we can see the wrong options.

The option A, difference implies a subtraction, so the difference between A and B is: A - B.

The option B, Decreased, also implies a subtraction. Used in the form " the number A decreased by the number B" this is A - B

The option D, combination, implies a multiplication, so the combination of A and B is A*B

The answer is C, per.

Per is used in the next way, when you say that some object has a speed of 100 km per hour, this is written as 100km/h

So if i say " you can get 10 pens per 5 dollars" then you got that a pen costs for a dollar you can get 10/5 =  2 pens.

yo answer should be 6 if im not mistaken

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15