Good morning fellow brainsters me i’m tired and i just drank a four can’t think. will give 15 points

7.

8. l=11cm and w=7 cm

9.

10.

Step-by-step explanation:

Question 7.

The given expression is:

Expand the parenthesis using the distributive property:

Group similar terms:

Simplify

Divide both sides by -10

Question 8:

Let the width of the rectangle be;

The length of the rectangle is

The perimeter is given as:

Given that the perimeter P=36, then:

Divide both sides by 2:

Subtract 4 from both sides:

The dimensions of the rectangle is: w=7 cm and l=7+4=11cm

Question 9

Let the number be x.

"5 fewer than the number" is written as

"5 fewer than a number is at least 12" becomes

Question 10:

Let the number be x.

The quotient of a number and 3 is written as:

The quotient of a number and 3 is no more than 15 is written as;

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option