PLEASE HELP, NEED RN! (worth 50 points, you MUST answer all three questions!!)

The Answer for #1 is found as follows:

Perimeter is the sum of all sides so...

8x+2+5x-4+9x+3=?

Group together the x's and the numbers:

8x+5x+9x+2-4+3=?

Answer = 22x+1

The Answer for #2 is found as follows:

Area of a triangle is 1/2 base times height

The bottom of the triangle is 4t, but we know t is 4 inches, so the bottom is 16.

The height is 7 times t which is 4... so the height is 28 inches.

using the formula, it will be 1/2(16)(28). The answer will be 224 inches squared.

The Answer for #2 is found as follows:

Polynomials cannot have squares or fractions. So the 2nd, 3rd, and 4th options are all not polynomials.

the difference between a number and 5 is -2.

step-by-step explanation:

notice that the equation you are given has -2 (negative 2) on the right side, not 2. when you subtract 5 from a number n, you are finding the difference between the number and 5.

the difference between a number and 5 is -2.

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240